86da6ab2db854a68f5b4cec56d0adb7c6634f153
tdreszer
  Thu Sep 9 08:55:25 2010 -0700
Added support for setCartVars to trigger compositeTdbCleanupOverrides... that is ajax can now trigger the handling of subtrack v. composite/view setting overrides
diff --git src/hg/js/utils.js src/hg/js/utils.js
index 6bc56ca..f16e198 100644
--- src/hg/js/utils.js
+++ src/hg/js/utils.js
@@ -1,921 +1,938 @@
 // Utility JavaScript
 // $Header: /projects/compbio/cvsroot/kent/src/hg/js/utils.js,v 1.31 2010/06/02 19:11:53 tdreszer Exp $
 
 var debug = false;
 
 function clickIt(obj,state,force)
 {
 // calls click() for an object, and click();click() if force
     if(obj.checked != state) {
         obj.click();
     } else if (force) {
         obj.click();
         obj.click();    //force onclick event
     }
 }
 function setCheckBoxesWithPrefix(obj, prefix, state)
 {
 // Set all checkboxes with given prefix to state boolean
     var list = inputArrayThatMatches("checkbox","id",prefix,"");
     for (var i=0;i<list.length;i++) {
         var ele = list[i];
             if(ele.checked != state)
                 ele.click();  // Forces onclick() javascript to run
     }
 }
 
 function setCheckBoxesThatContain(nameOrId, state, force, sub1)
 {
 // Set all checkboxes which contain 1 or more given substrings in NAME or ID to state boolean
 // First substring: must begin with it; 2 subs: beg and end; 3: begin, middle and end.
 // This can force the 'onclick() js of the checkbox, even if it is already in the state
     if(debug)
         alert("setCheckBoxesContains is about to set the checkBoxes to "+state);
     var list;
     if(arguments.length == 4)
         list = inputArrayThatMatches("checkbox",nameOrId,sub1,"");
     else if(arguments.length == 5)
         list = inputArrayThatMatches("checkbox",nameOrId,sub1,arguments[4]);
     else if(arguments.length == 6)
         list = inputArrayThatMatches("checkbox",nameOrId,sub1,arguments[4],arguments[5]);
     for (var ix=0;ix<list.length;ix++) {
         clickIt(list[ix],state,force);
     }
     return true;
 }
 
 function inputArrayThatMatches(inpType,nameOrId,prefix,suffix)
 {
     // returns an array of input controls that match the criteria
     var found = new Array();
     var fIx = 0;
     if (document.getElementsByTagName)
     {
         var list;
         if(inpType == 'select')
             list = document.getElementsByTagName('select');
         else
             list = document.getElementsByTagName('input');
         for (var ix=0;ix<list.length;ix++) {
             var ele = list[ix];
             if(inpType.length > 0 && inpType != 'select' && ele.type != inpType)
                 continue;
             var identifier = ele.name;
             if(nameOrId.search(/id/i) != -1)
                 identifier = ele.id;
             var failed = false;
             if(prefix.length > 0)
                 failed = (identifier.indexOf(prefix) != 0)
             if(!failed && suffix.length > 0)
                 failed = (identifier.lastIndexOf(suffix) != (identifier.length - suffix.length))
             if(!failed) {
                 for(var aIx=4;aIx<arguments.length;aIx++) {
                     if(identifier.indexOf(arguments[aIx]) == -1) {
                         failed = true;
                         break;
                     }
                 }
             }
             if(!failed) {
                 found[fIx] = ele;
                 fIx++;
             }
         }
     } else {
         // NS 4.x - I gave up trying to get this to work.
         if(debugLevel>2)
            alert("arrayOfInputsThatMatch is unimplemented for this browser");
     }
     return found;
 }
 function showSubTrackCheckBoxes(onlySelected)
 {
 // If a Subtrack configuration page has show "only selected subtracks" option,
 // This can show/hide tablerows that contain the checkboxes
 // Containing <tr>'s must be id'd with 'tr_' + the checkbox id,
 // while checkbox id must have 'cb_' prefix (ie: 'tr_cb_checkThis' & 'cb_checkThis')
    if (document.getElementsByTagName)
    {
         var list = document.getElementsByTagName('tr');
         for (var ix=0;ix<list.length;ix++) {
             var tblRow = list[ix];
             if(tblRow.id.indexOf("tr_cb_") >= 0) {  // marked as tr containing a cb
                 if(!onlySelected) {
                     tblRow.style.display = ''; //'table-row' doesn't work in some browsers (ie: IE)
                 } else {
                     var associated_cb = tblRow.id.substring(3,tblRow.id.length);
                     chkBox = document.getElementById(associated_cb);
                     if(chkBox!=undefined && chkBox.checked && chkBox.disabled == false)
                         tblRow.style.display = '';
                     else
                         tblRow.style.display = 'none';  // hides
                 }
             }
         }
    }
    else if (document.all) {
         if(debug)
             alert("showSubTrackCheckBoxes is unimplemented for this browser");
    } else {
         // NS 4.x - I gave up trying to get this to work.
         if(debug)
            alert("showSubTrackCheckBoxes is unimplemented for this browser");
    }
 }
 
 function hideOrShowSubtrack(obj)
 {
 // This can show/hide a tablerow that contains a specific object
 // Containing <tr>'s must be id'd with 'tr_' + obj.id
 // Also, this relies upon the "displaySubtracks" radio button control
     var tblRow = document.getElementById("tr_"+obj.id);
 
     if(!obj.checked || obj.disabled)
     {
         var list = document.getElementsByName("displaySubtracks");
         for (var ix=0;ix<list.length;ix++) {
             if(list[ix].value == "selected") {
                 if(list[ix].checked)
                     tblRow.style.display = 'none';  // hides
                 else
                     tblRow.style.display = ''; //'table-row' doesn't work in some browsers (ie: IE)
                 break;
             }
         }
     }
     else
         tblRow.style.display = '';
 }
 
 function waitCursor(obj)
 {
     //document.body.style.cursor="wait"
     obj.style.cursor="wait";
 }
 
 function endWaitCursor(obj)
 {
     obj.style.cursor="";
 }
 
 function getURLParam()
 {
 // Retrieve variable value from an url.
 // Can be called either:
 //     getURLParam(url, name)
 // or:
 //     getURLParam(name)
 // Second interface will default to using window.location.href
     var strHref, strParamName;
     var strReturn = "";
     if(arguments.length == 1) {
           strHref = window.location.href;
           strParamName = arguments[0];
     } else {
           strHref = arguments[0];
           strParamName = arguments[1];
     }
     if ( strHref.indexOf("?") > -1 ){
       var strQueryString = strHref.substr(strHref.indexOf("?")).toLowerCase();
       var aQueryString = strQueryString.split("&");
       for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){
          if (aQueryString[iParam].indexOf(strParamName.toLowerCase() + "=") > -1 ){
             var aParam = aQueryString[iParam].split("=");
             strReturn = aParam[1];
             break;
          }
       }
     }
     return unescape(strReturn);
 }
 
 function makeHiddenInput(theForm,aName,aValue)
 {   // Create a hidden input to hold a value
     $(theForm).find("input:last").after("<input type=hidden name='"+aName+"' value='"+aValue+"'>");
 }
 
 function updateOrMakeNamedVariable(theForm,aName,aValue)
 {   // Store a value to a named input.  Will make the input if necessary
     var inp = $(theForm).find("input[name='"+aName+"']:last");
     if(inp != undefined && inp.length > 0)
         inp.val(aValue);
     else
         makeHiddenInput(theForm,aName,aValue);
 }
 
 function parseUrlAndUpdateVars(theForm,href)
 {   // Parses the URL and converts GET vals to POST vals
     var url = href;
     var extraIx = url.indexOf("?");
     if(extraIx > 0) {
         var extra = url.substring(extraIx+1);
         url = url.substring(0,extraIx);
         // now extra must be repeatedly broken into name=var
         extraIx = extra.indexOf("=");
         for(;extraIx > 0;extraIx = extra.indexOf("=")) {
             var aValue;
             var aName = extra.substring(0,extraIx);
             var endIx = extra.indexOf("&");
             if( endIx>0) {
                 aValue = extra.substring(extraIx+1,endIx);
                 extra  = extra.substring(endIx+1);
             } else {
                 aValue = extra.substring(extraIx+1);
                 extra  = "";
             }
             if(aName.length>0 && aValue.length>0)
                 updateOrMakeNamedVariable(theForm,aName,aValue);
         }
     }
     return url;
 }
 
 function postTheForm(formName,href)
 {   // posts the form with a passed in href
     var goodForm=$("form[name='"+formName+"']");
     if(goodForm.length == 1) {
         if(href != undefined && href.length > 0) {
             $(goodForm).attr('action',href); // just attach the straight href
         }
         $(goodForm).attr('method','POST');
 
         $(goodForm).submit();
     }
     return false; // Meaning do not continue with anything else
 }
 function setVarAndPostForm(aName,aValue,formName)
 {   // Sets a specific variable then posts
     var goodForm=$("form[name='"+formName+"']");
     if(goodForm.length == 1) {
         updateOrMakeNamedVariable(goodForm,aName,aValue);
     }
     return postTheForm(formName,window.location.href);
 }
 
 function aryFind(ary,val)
 {// returns the index of a value on the array or -1;
     for(var ix=0;ix<ary.length;ix++) {
         if(ary[ix] == val) {
             return ix;
         }
     }
     return -1;
 }
 
 function aryRemoveVals(ary,vals)
 { // removes one or more variables that are found in the array
     for(var vIx=0;vIx<vals.length;vIx++) {
         var ix = aryFind(ary,vals[vIx]);
         if(ix != -1)
             ary.splice(ix,1);
     }
     return ary;
 }
 
 function aryRemove(ary,val)
 { // removes one or more variables that are found in the array
     for(var vIx=1;vIx<arguments.length;vIx++) {
         var ix = aryFind(ary,arguments[vIx]);
         if(ix != -1)
             ary.splice(ix,1);
     }
     return ary;
 }
 
 function isInteger(s)
 {
     return (!isNaN(parseInt(s)) && isFinite(s) && s.toString().indexOf('.') < 0);
 }
 function isFloat(s)
 {
     return (!isNaN(parseFloat(s)) && isFinite(s));
 }
 
 function validateInt(obj,min,max)
 {   // validates an integer which may be restricted to a range (if min and/or max are numbers)
     var title = obj.title;
     var rangeMin=parseInt(min);
     var rangeMax=parseInt(max);
     if(title.length == 0)
         title = "Value";
     var popup=( $.browser.msie == false );
     for(;;) {
         if((obj.value == undefined || obj.value == "") && isInteger(obj.defaultValue))
             obj.value = obj.defaultValue;
         if(!isInteger(obj.value)) {
             if(popup) {
                 obj.value = prompt(title +" is invalid.\nMust be an integer.",obj.value);
                 continue;
             } else {
                 alert(title +" of '"+obj.value +"' is invalid.\nMust be an integer."); // try a prompt box!
                 obj.value = obj.defaultValue;
                 return false;
             }
         }
         var val = parseInt(obj.value);
         if(isInteger(min) && isInteger(max)) {
             if(val < rangeMin || val > rangeMax) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be between "+rangeMin+" and "+rangeMax+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be between "+rangeMin+" and "+rangeMax+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         } else if(isInteger(min)) {
             if(val < rangeMin) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be no less than "+rangeMin+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be no less than "+rangeMin+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         } else if(isInteger(max)) {
             if(val > rangeMax) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be no greater than "+rangeMax+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be no greater than "+rangeMax+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         }
         return true;
     }
 }
 
 function validateFloat(obj,min,max)
 {   // validates an float which may be restricted to a range (if min and/or max are numbers)
     var title = obj.title;
     var rangeMin=parseFloat(min);
     var rangeMax=parseFloat(max);
     if(title.length == 0)
         title = "Value";
     var popup=( $.browser.msie == false );
     for(;;) {
         if((obj.value == undefined || obj.value == "") && isFloat(obj.defaultValue))
             obj.value = obj.defaultValue;
         if(!isFloat(obj.value)) {
             if(popup) {
                 obj.value = prompt(title +" is invalid.\nMust be a number.",obj.value);
                 continue;
             } else {
                 alert(title +" of '"+obj.value +"' is invalid.\nMust be a number."); // try a prompt box!
                 obj.value = obj.defaultValue;
                 return false;
             }
         }
         var val = parseFloat(obj.value);
         if(isFloat(min) && isFloat(max)) {
             if(val < rangeMin || val > rangeMax) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be between "+rangeMin+" and "+rangeMax+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be between "+rangeMin+" and "+rangeMax+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         } else if(isFloat(min)) {
             if(val < rangeMin) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be no less than "+rangeMin+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be no less than "+rangeMin+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         } else if(isFloat(max)) {
             if(val > rangeMax) {
                 if(popup) {
                     obj.value = prompt(title +" is invalid.\nMust be no greater than "+rangeMax+".",obj.value);
                     continue;
                 } else {
                     alert(title +" of '"+obj.value +"' is invalid.\nMust be no greater than "+rangeMax+".");
                     obj.value = obj.defaultValue;
                     return false;
                 }
             }
         }
         return true;
     }
 }
 
 function metadataShowHide(tableName,showLonglabel,showShortLabel)
 {
 // Will show subtrack specific configuration controls
 // Config controls not matching name will be hidden
     var divit = $("#div_"+tableName+"_meta");
     if($(divit).css('display') == 'none') {
         $("#div_"+tableName+"_cfg").hide();  // Hide any configuration when opening metadata
 
         if($(divit).find('table').length == 0) {
             lookupMetadata(tableName,showLonglabel,showShortLabel);
         }
     }
     $(divit).toggle();  // jQuery hide/show
     return false;
 }
 
 function warnBoxJsSetup()
 {   // Sets up warnBox if not already established.  This is duplicated from htmshell.c
     var html = "";
     html += "<center>";
     html += "<div id='warnBox' style='display:none; background-color:Beige; ";
     html += "border: 3px ridge DarkRed; width:640px; padding:10px; margin:10px; ";
     html += "text-align:left;'>";
     html += "<CENTER><B id='warnHead' style='color:DarkRed;'></B></CENTER>";
     html += "<UL id='warnList'></UL>";
     html += "<CENTER><button id='warnOK' onclick='hideWarnBox();return false;'></button></CENTER>";
     html += "</div></center>";
 
     html += "<script type='text/javascript'>";
     html += "function showWarnBox() {";
     html += "document.getElementById('warnOK').innerHTML='&nbsp;OK&nbsp;';";
     html += "var warnBox=document.getElementById('warnBox');";
     html += "warnBox.style.display=''; warnBox.style.width='65%%';";
     html += "document.getElementById('warnHead').innerHTML='Error(s):';";
     html += "}";
     html += "function hideWarnBox() {";
     html += "var warnBox=document.getElementById('warnBox');";
     html += "warnBox.style.display='none';warnBox.innerHTML='';";
     html += "var endOfPage = document.body.innerHTML.substr(document.body.innerHTML.length-20);";
     html += "if(endOfPage.lastIndexOf('-- ERROR --') > 0) { history.back(); }";
     html += "}";
     html += "</script>";
 
     $('body').prepend(html);
 }
 
 function warn(msg)
 { // adds warnings to the warnBox
     var warnList = $('#warnList'); // warnBox contains warnList
     if( warnList == undefined || $(warnList).length == 0 ) {
         warnBoxJsSetup();
         warnList = $('#warnList');
     }
     if( $(warnList).length == 0 )
         alert(msg);
     else {
         $( warnList ).append('<li>'+msg+'</li>');
         if(showWarnBox != undefined)
             showWarnBox();
         else
             alert(msg);
     }
 }
 
 function cgiBooleanShadowPrefix()
 // Prefix for shadow variable set with boolean variables.
 // Exact copy of code in cheapcgi.c
 {
     return "boolshad.";
 }
 
 function getAllVars(obj,subtrackName)
 {
 // Returns a hash for all inputs and selects in an obj.
 // If obj is undefined then obj is document!
     var urlData = new Object();
     if($(obj) == undefined)
         obj = $('document');
     var inp = $(obj).find('input');
     var sel = $(obj).find('select');
     //warn("obj:"+$(obj).attr('id') + " inputs:"+$(inp).length+ " selects:"+$(sel).length);
     $(inp).filter('[name]:enabled').each(function (i) {
         var name  = $(this).attr('name');
         var val = $(this).val();
         if($(this).attr('type') == 'checkbox') {
             name = cgiBooleanShadowPrefix() + name;
             val = $(this).attr('checked') ? 1 : 0;
         }
         if(name != undefined && name != "Submit" && val != undefined) {
             urlData[name] = val;
         }
     });
     $(sel).filter('[name]:enabled').each(function (i) {
         var name  = $(this).attr('name');
         var val = $(this).val();
         if(name != undefined && val != undefined) {
             if(subtrackName != undefined && name == subtrackName) {
                 if(val == 'hide') {
                    urlData[name+"_sel"] = 0;    // Can't delete "_sel" because default takes over
                    urlData[name]        = "[]";  // can delete vis because subtrack vis should be inherited.
                 } else {
                     urlData[name+"_sel"] = 1;
                     urlData[name]        = val;
                 }
             } else
                 urlData[name] = val;
         }
     });
     return urlData;
 }
 
 function setIdRemoveName(obj)
 { // This function removes the name of an obj and sets it as the id.  This is very useful
   // to override forms submitting named inputs and instead setCartVarFromObjId() can be used selectively
     var id = $(obj).attr('name');
     if(id != undefined) {
         $(obj).attr('id',id);
         $(obj).removeAttr('name');
     }
     //warn($(obj).attr('id')+'='+$(obj).val()+" name:"+$(obj).attr('name'));
 }
 
 
 function varHashChanges(newVars,oldVars)
 {
 // Returns a hash of all vars that are changed between old and new hash.  New vars not found in old are changed.
     var changedVars = new Object();
     for (var newVar in newVars) {
         if(oldVars[newVar] == null || oldVars[newVar] != newVars[newVar])
             changedVars[newVar] = newVars[newVar];
     }
     return changedVars;
 }
 
 function varHashToQueryString(varHash)
 {
 // return a CGI QUERY_STRING for name/vals in given object
     var retVal = "";
     var count = 0;
     for (var aVar in varHash) {
         if(count++ > 0) {
             retVal += "&";
         }
         // XXXX encode var=val ?
         retVal += aVar + "=" + varHash[aVar];
     }
     return retVal;
 }
 
 function getAllVarsAsUrlData(obj)
 {
 // Returns a string in the form of var1=val1&var2=val2... for all inputs and selects in an obj
 // If obj is undefined then obj is document!
     return varHashToQueryString(getAllVars(obj));
 }
 
 /*
 function popupBox(popit, content, popTitle)
 {
 // Kicks off a Modal Dialog for the provided content.
 // Requires jquery-ui.js
 // NEEDS SOME WORK
 
     warn(content);
 
     // Set up the popit div if necessary
     if(popit == undefined) {
         popit = $('#popit');
 
         if(popit == undefined) {
             $('body').prepend("<div id='popit' style='display: none'></div>");
             popit = $('#popit');
         }
     }
 
     // Set up the modal dialog
     $(popit).html("<div style='font-size:80%'>" + content + "</div>");
     $(popit).dialog({
                                ajaxOptions: {
                                    // This doesn't work
                                    cache: true
                                },
                                resizable: true,
                                bgiframe: true,
                                height: 'auto',
                                width: 'auto',
                                minHeight: 200,
                                minWidth: 400,
                                modal: true,
                                closeOnEscape: true,
                                autoOpen: false,
                                close: function() {
                                    // clear out html after close to prevent problems caused by duplicate html elements
                                    $(popDiv).empty();
                                }
                            });
     // Apparently the options above to dialog take only once, so we set title explicitly.
     if(popTitle != undefined && popTitle.length > 0)
         $(popit).dialog('option' , 'title' , popTitle );
     else
         $(popit).dialog('option' , 'title' , "Please Respond");
     jQuery('body').css('cursor', '');
     $(popit).dialog('open');
 }
 */
 
 function embedBoxOpen(boxit, content, reenterable) // 4 extra STRING Params: boxWidth, boxTitle, applyFunc, applyName
 {
 // embeds a box for the provided content.
 // This box has 1 button (close) by default and 2 buttons if the name of an applyFunc is provided (apply, cancel)
 // If there is no apply function, the box may be reentrent, meaning subsequent calls do not need to provide content
 
     // Define extra params now
     var boxWidth = "80%";
     var boxTitle = "";
     var applyFunc = "";
     var applyName = "Apply";
     if (arguments.length > 3 && arguments[3].length > 0) // FIXME: could check type
         boxWidth = arguments[3];
     if (arguments.length > 4 && arguments[4].length > 0)
         boxTitle = arguments[4];
     if (arguments.length > 5 && arguments[5].length > 0)
         applyFunc = arguments[5];
     if (arguments.length > 6 && arguments[6].length > 0)
         applyName = arguments[6];
 
     // Set up the popit div if necessary
     if (boxit == undefined) {
         boxit = $('div#boxit');
 
         if (boxit == undefined) {
             $('body').prepend("<div id='boxit'></div>");
             //$('body').prepend("<div id='boxit' style='display: none'></div>");
             boxit = $('div#boxit');
         }
     }
     if (!reenterable || (content.length > 0)) { // Can reenter without changing content!
 
         var buildHtml = "<center>";
         if (boxTitle.length > 0)
             buildHtml += "<div style='background-color:#D9E4F8;'><B>" +  boxTitle + "</B></div>";
 
         buildHtml += "<div>" + content + "</div>";
 
         // Set up closing code
         var closeButton = "Close";
         var closeHtml = "embedBoxClose($(\"#"+ $(boxit).attr('id') + "\"),";
         if (reenterable && applyFunc.length == 0)
             closeHtml += "true);"
         else
             closeHtml += "false);";
 
         // Buttons
         buildHtml += "<div>";
         if (applyFunc.length > 0) { // "Apply" button and "Cancel" button.  Apply also closes!
             buildHtml += "&nbsp;<INPUT TYPE='button' value='" + applyName + "' onClick='"+ applyFunc + "(" + $(boxit).attr('id') + "); " + closeHtml + "'>&nbsp;";
             closeButton = "Cancel"; // If apply button then close is cancel
         }
         buildHtml += "&nbsp;<INPUT TYPE='button' value='" + closeButton + "' onClick='" + closeHtml + "'>&nbsp;";
         buildHtml += "</div>";
 
         $(boxit).html("<div class='blueBox' style='width:" + boxWidth + "; background-color:#FFF9D2;'>" + buildHtml + "</div>");  // Make it boxed
     }
 
     if ($(boxit).html() == null || $(boxit).html().length == 0)
         warn("embedHtmlBox() called without content");
     else
         $(boxit).show();
 }
 
 function embedBoxClose(boxit, reenterable) // 4 extra STRING Params: boxWidth, boxTitle, applyFunc, applyName
 {
 // Close an embedded box
     if (boxit != undefined) {
         $(boxit).hide();
         if(!reenterable)
             $(boxit).empty();
     }
 }
 
 function startTiming()
 {
     var now = new Date();
     return now.getTime();
 }
 
 function showTiming(start,whatTookSoLong)
 {
     var now = new Date();
     var end = (now.getTime() - start);
     warn(whatTookSoLong+" took "+end+" msecs.");
     return end;
 }
 
 function getHgsid()
 {
 // return current session id
     var hgsid;
     var list = document.getElementsByName("hgsid");
     if(list.length) {
         var ele = list[0];
         hgsid = ele.value;
     }
     if(!hgsid) {
         hgsid = getURLParam(window.location.href, "hgsid");
     }
     return hgsid;
 }
 
 function getDb()
 {
     var db = document.getElementsByName("db");
     if(db == undefined || db.length == 0)
+        {
+        db = $("#db");
+        if(db == undefined || db.length == 0)
         return ""; // default?
+        }
     return db[0].value;
 }
 
+function getTrack()
+{
+    var track = $("#track");
+    if(track == undefined || track.length == 0)
+        return ""; // default?
+    return track[0].value;
+}
+
 function Rectangle()
 {
 // Rectangle object constructor:
 // calling syntax:
 //
 // new Rectangle(startX, endX, startY, endY)
 // new Rectangle(coords) <-- coordinate string from an area item
     if(arguments.length == 4) {
         this.startX = arguments[0];
         this.endX = arguments[1];
         this.startY = arguments[2];
         this.endY = arguments[3];
-    } else {
+    } else if(arguments.length > 0)  { 
         var coords = arguments[0].split(",");
         this.startX = coords[0];
         this.endX = coords[2];
         this.startY = coords[1];
         this.endY = coords[3];
+    } else { // what else to do?
+        this.startX = 0;
+        this.endX = 100;
+        this.startY = 0;
+        this.endY = 100;
     }
 }
 
 Rectangle.prototype.contains = function(x, y)
 {
 // returns true if given points are in the rectangle
     var retval = x >= this.startX && x <= this.endX && y >= this.startY && y <= this.endY;
     return retval;
 }
 
 function commify (str) {
     if(typeof(str) == "number")
 	str = str + "";
     var n = str.length;
     if (n <= 3) {
 	return str;
     } else {
 	var pre = str.substring(0, n-3);
 	var post = str.substring(n-3);
 	var pre = commify(pre);
 	return pre + "," + post;
     }
 }
 
 function parsePosition(position)
 {
 // Parse chr:start-end string into a chrom, start, end object
     position = position.replace(/,/g, "");
     var a = /(\S+):(\d+)-(\d+)/.exec(position);
     if(a != null && a.length == 4) {
         var o = new Object();
         o.chrom = a[1];
         o.start = parseInt(a[2])
         o.end = parseInt(a[3]);
         return o;
     }
     return null;
 }
 
 function getSizeFromCoordinates(position)
 {
 // Parse size out of a chr:start-end string
     var o = parsePosition(position);
     if(o != null) {
         return o.end - o.start + 1;
     }
     return null;
 }
 
 // This code is intended to allow setting up a wait cursor while waiting on the function
 var gWaitFuncArgs = [];
 var gWaitFunc;
 
 function waitMaskClear()
 { // Clears the waitMask
     var  waitMask = $('#waitMask');
     if( waitMask != undefined )
         $(waitMask).hide();
 }
 
 function waitMaskSetup(timeOutInMs)
 { // Sets up the waitMask to block page manipulation until cleared
 
     // Find or create the waitMask (which masks the whole page)
     var  waitMask = $('#waitMask');
     if( waitMask == undefined || waitMask.length != 1) {
         // create the waitMask
         $("body").append("<div id='waitMask' class='waitMask');'></div>");
         waitMask = $('#waitMask');
         // Special for IE
         if ($.browser.msie)
             $(waitMask).css('filter','alpha(opacity= 0)');
     }
     $(waitMask).css('display','block');
 
     // Things could fail, so always have a timeout.
     if(timeOutInMs == undefined || timeOutInMs <=0)
         timeOutInMs = 5000; // Don't ever leave this as infinite
     setTimeout('waitMaskClear();',timeOutInMs); // Just in case
 }
 
 function _launchWaitOnFunction()
 { // should ONLY be called by waitOnFunction()
   // Launches the saved function
     var func = gWaitFunc;
     gWaitFunc = null;
     var funcArgs = gWaitFuncArgs;
     gWaitFuncArgs = [];
 
     if(func == undefined || !jQuery.isFunction(func))
         warn("_launchWaitOnFunction called without a function");
     else {
         if(funcArgs.length == 0)
             func();
         else if (funcArgs.length == 1)
             func(funcArgs[0]);
         else if (funcArgs.length == 2)
             func(funcArgs[0],funcArgs[1]);
         else if (funcArgs.length == 3)
             func(funcArgs[0],funcArgs[1],funcArgs[2]);
         else if (funcArgs.length == 4)
             func(funcArgs[0],funcArgs[1],funcArgs[2],funcArgs[3]);
         else if (funcArgs.length == 5)
             func(funcArgs[0],funcArgs[1],funcArgs[2],funcArgs[3],funcArgs[4]);
         else
             warn("_launchWaitOnFunction called with " + funcArgs.length + " arguments.  Only 5 are supported.");
     }
     // Special if the first var is a button that can visually be inset
     if(funcArgs.length > 0 && funcArgs[0].type != undefined) {
         if(funcArgs[0].type == 'button' && $(funcArgs[0]).hasClass('inOutButton')) {
             $(funcArgs[0]).css('borderStyle',"outset");
         }
     }
     // Now we can get rid of the wait cursor
     waitMaskClear();
 }
 
 function waitOnFunction(func)
 { // sets the waitMask (wait cursor and no clicking), then launches the function with up to 5 arguments
     if(!jQuery.isFunction(func)) {
         warn("waitOnFunction called without a function");
         return false;
     }
     if(arguments.length > 6) {
         warn("waitOnFunction called with " + arguments.length - 1 + " arguments.  Only 5 are supported.");
         return false;
     }
 
     waitMaskSetup(5000);  // Find or create the waitMask (which masks the whole page) but gives up after 5sec
 
     // Special if the first var is a button that can visually be inset
     if(arguments.length > 1 && arguments[1].type != undefined) {
         if(arguments[1].type == 'button' && $(arguments[1]).hasClass('inOutButton')) {
             $(arguments[1]).css( 'borderStyle',"inset");
         }
     }
 
     // Build up the aruments array
     for(var aIx=1;aIx<arguments.length;aIx++) {
         gWaitFuncArgs.push(arguments[aIx])
     }
     gWaitFunc = func;
 
     setTimeout('_launchWaitOnFunction();',50);
 
 }
 
 function showLoadingImage(id)
 {
 // Show a loading image above the given id; return's id of div added (so it can be removed when loading is finished).
 // This code was mostly directly copied from hgHeatmap.js, except I also added the "overlay.appendTo("body");"
     var loadingId = id + "LoadingOverlay";
     var overlay = $("<div></div>").attr("id", loadingId).css("position", "absolute");
     overlay.appendTo("body");
     overlay.css("top", $('#'+ id).position().top);
     var divLeft = $('#'+ id).position().left + 2;
     overlay.css("left",divLeft);
     var width = $('#'+ id).width() - 5;
     var height = $('#'+ id).height();
     overlay.width(width);
     overlay.height(height);
     overlay.css("background", "white");
     overlay.css("opacity", 0.75);
     var imgLeft = (width / 2) - 110;
     var imgTop = (height / 2 ) - 10;
     $("<img src='../images/loading.gif'/>").css("position", "relative").css('left', imgLeft).css('top', imgTop).appendTo(overlay);
     return loadingId;
 }
 
 function hideLoadingImage(id)
 {
     $('#' + id).remove();
 }