CRM 4.0 OnChange code not firing on multi-entity lookup.

function MultiEntityTypeLookup(PrimaryLookupFieldName){this.PrimaryLookupFieldName=PrimaryLookupFieldName;this.MultiLookupFieldName="c5_multilookup_"+this.PrimaryLookupFieldName;this.LookUps=new Object();this.LookUpsCount=0;this.ProcessMultiLookup=true;this.ReadOnly=!(crmForm.FormType==1||crmForm.FormType==2||crmForm.FormType==6);try{eval('var lookup = crmForm.all.'+this.PrimaryLookupFieldName+'; if (lookup) this.LookUps[\''+this.PrimaryLookupFieldName+'\'] = lookup;');eval('this.PrimaryLookupControl = crmForm.all.'+this.PrimaryLookupFieldName);}catch(ex){}if(this.PrimaryLookupControl){this.LookUpsCount=1;}else{this.ProcessMultiLookup=false;alert('Client side script multi-lookup argument invalid '+this.PrimaryLookupFieldName);}for(var i=1;i<arguments.length;i++){try{eval('var lookup = crmForm.all.'+arguments[i]+'; if (lookup) this.LookUps[\''+arguments[i]+'\'] = lookup;');}catch(ex){}if(!this.LookUps[arguments[i]]){alert('Client side script multi-lookup argument invalid '+arguments[i]);}else{this.LookUpsCount++;}}if(!this.ReadOnly){var duplicateType=false;for(testKey in this.LookUps){var testType=this.LookupAttribute(testKey,'lookuptypes');for(searchKey in this.LookUps){var searchType=this.LookupAttribute(searchKey,'lookuptypes');if(testType==searchType&&testKey!=searchKey){this.ProcessMultiLookup=false;var message='Duplicate lookup types are not supported. '+testKey+' and '+searchKey+' are of the same lookup type!';alert(message);return;}}}}this.ProcessMultiLookup=this.LookUpsCount>=2;if(this.ProcessMultiLookup){this.PrimaryLookupInnerHTML=this.GetLookupCell(this.PrimaryLookupFieldName).innerHTML;var MultiEntityData;for(keyVar in this.LookUps){var lookup=this.LookUps[keyVar];if(lookup.DataValue!=null){MultiEntityData=lookup.DataValue;break;}}var MultiEntityTypeLookupEditField=this.GetField(this.PrimaryLookupFieldName+"_ledit");var tabIndex;if(MultiEntityTypeLookupEditField==null){tabIndex=PrimaryLookupControl.getAttribute("tabIndex");}else{tabIndex=MultiEntityTypeLookupEditField.getAttribute("tabIndex");}var lookupTypes=this.ConcatLookupAttributes('lookuptypes',',');var lookupTypeNames=this.ConcatLookupAttributes('lookuptypenames',',');var lookupTypeIcons=this.ConcatLookupAttributes('lookuptypeIcons',':');var reqLevel=this.LookupAttribute(this.PrimaryLookupFieldName,'req');var multiLookupIdHtml=this.GetLookupFieldHtml(this.MultiLookupFieldName,tabIndex,lookupTypes,lookupTypeNames,lookupTypeIcons,reqLevel);this.ExchangeLookups(this.MultiLookupFieldName,this.PrimaryLookupFieldName,multiLookupIdHtml,true);this.MultiLookup=this.GetField(this.MultiLookupFieldName);this.MultiLookup.DataValue=MultiEntityData;if(this.ReadOnly){this.Disable(true);}}};
MultiEntityTypeLookup.prototype.ConcatLookupAttributes=function(attributeName,delimiter){var concat='';for(keyVar in this.LookUps){var lookup=this.LookUps[keyVar];if(concat.length>0)concat+=delimiter;concat+=lookup.attributes.item(attributeName).value;}return concat;};
MultiEntityTypeLookup.prototype.LookupAttribute=function(lookupName,attributeName){var lookup=this.LookUps[lookupName];if(lookup){return lookup.attributes.item(attributeName).value;}else{return null;}};
MultiEntityTypeLookup.prototype.GetLookupFieldHtml=function(name,tabIndex,lookupTypes,lookupTypeNames,lookupTypeIcons,reqLevel){var html="<table class=\"ms-crm-Lookup\" cellpadding=\"0\" cellspacing=\"0\" width=\"100%\" style=\"table-layout:fixed;\">"+"<tbody>"+"<tr>"+"<td>"+"<div ime-mode=\"auto\" class=\"ms-crm-Lookup\" tabindex=\""+(parseInt(tabIndex)+1)+"\"></div>"+"<label class=\"ms-crm-Hidden-NoBehavior\" for=\""+name+"_ledit\"></label>"+"<input class=\"ms-crm-Hidden-NoBehavior\" ime-mode=\"auto\" type=\"text\" tabindex=\""+tabIndex+"\" id=\""+name+"_ledit\" maxlength=\"1000\"/>"+"</td>"+"<td width=\"25\" class=\"Lookup_RenderButton_td\">"+"<img src=\"/_imgs/btn_off_lookup.gif\" id=\""+name+"\" class=\"ms-crm-Lookup\" req=\""+reqLevel+"\" style=\"ime-mode:auto\" lookuptypes=\""+lookupTypes+"\" lookuptypenames=\""+lookupTypeNames+"\" lookuptypeIcons=\""+lookupTypeIcons+"\" lookupclass=\"BasicCustomer\" lookupbrowse=\"0\" lookupstyle=\"single\" defaulttype=\"0\" autoresolve=\"1\" showproperty=\"1\" resolveemailaddress=\"0\">"+"<a href=\"#\" onclick=\"previousSibling.click();\" tabindex=\"-1\"></a>"+"</td>"+"</tr>"+"</tbody>"+"</table>";return html;};
MultiEntityTypeLookup.prototype.GetField=function(name){var oItem=crmForm.all.item(name);return oItem;};
MultiEntityTypeLookup.prototype.GetLookupCellId=function(name){return name+"_d";};
MultiEntityTypeLookup.prototype.GetLookupCell=function(name){return this.GetField(this.GetLookupCellId(name));};
MultiEntityTypeLookup.prototype.ExchangeLookups=function(lookupToShowId,lookupToHideId,newLookupHtml,isNewLookup){var prevCell=this.GetLookupCell(lookupToHideId);var prevCellIndex=prevCell.cellIndex;var row=prevCell.parentNode;if(isNewLookup){prevCell.style.display="none";var newCell=row.insertCell(prevCellIndex);newCell.id=this.GetLookupCellId(lookupToShowId);newCell.innerHTML=newLookupHtml;}else{row.deleteCell(prevCellIndex);this.GetLookupCell(lookupToShowId).style.display="";}};
MultiEntityTypeLookup.prototype.OnSave=function(){if(this.ProcessMultiLookup&&!this.ReadOnly){var MultiEntity=this.MultiLookup.DataValue;this.ExchangeLookups(this.PrimaryLookupFieldName,this.MultiLookupFieldName,this.PrimaryLookupInnerHTML,false);eval('this.LookUps[\''+this.PrimaryLookupFieldName+'\'] = crmForm.all.'+this.PrimaryLookupFieldName+';');var MultiEntitytype='';if(MultiEntity)MultiEntitytype=MultiEntity[0].type+'';for(keyVar in this.LookUps){var lookup=this.LookUps[keyVar];var thistype=this.LookupAttribute(keyVar,'lookuptypes');if(thistype==MultiEntitytype){lookup.DataValue=MultiEntity;}else{lookup.DataValue=null;}lookup.ForceSubmit=true;}this.ProcessMultiLookup=false;}else{}};
MultiEntityTypeLookup.prototype.HasValue=function(){return(this.MultiLookup!=null&&this.MultiLookup.DataValue!=null);};
MultiEntityTypeLookup.prototype.SelectedName=function(){return this.HasValue()?this.MultiLookup.DataValue[0].name:null;};
MultiEntityTypeLookup.prototype.SelectedType=function(){return this.HasValue()?this.MultiLookup.DataValue[0].type:null;};
MultiEntityTypeLookup.prototype.Disable=function(disabled){var CLASS_ENABELD='ms-crm-Lookup';var CLASS_DISABELD='ms-crm-Lookup ms-crm-ReadOnly ms-crm-ReadOnly';this.MultiLookup.disabled=disabled;this.MultiLookup.src=disabled?"/_imgs/btn_dis_lookup.gif":"/_imgs/btn_off_lookup.gif";this.MultiLookup.style.setAttribute("cursor",disabled?"auto":"hand");this.MultiLookup.className=disabled?CLASS_DISABELD:CLASS_ENABELD;this.MultiLookup.parentNode.parentNode.children[0].childNodes[0].className=disabled?CLASS_DISABELD:CLASS_ENABELD;};
MultiEntityTypeLookup.prototype.ReadOnly=false;

/////////////////// Multi entity lookup form code ////////////////////////
debugger;
OnLoad = function()
{             
   document.CustomLookup=new MultiEntityTypeLookup('dlr_contactid', 'dlr_organisationid');
  
    if (crmForm.all.tab3Tab != null) {
        crmForm.all.tab3Tab.style.display = "none";
crmForm.all.dlr_contactid.FireOnChange();
    }
}
OnSave = function()
{
    if (document.CustomLookup)  document.CustomLookup.OnSave();
}
OnLoad();
/////////////////// End multi entity lookup form code ////////////////////////

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