Cold Fusion CFSELECT binding question

<!--- =start boundSelects.cfm --->
    <!--- example javascript function to maintain selection in a bound dropdown using cfajaxproxy--->
    <cfif FORM.Submit>
      	<cfajaxproxy bind="javascript:selectDropDown({CatID},#FORM.CatID#)">
   </cfif>
   <!--- =maintain selection in a bound select box by calling a javascript function and cfajaxproxy --->
   <!--- =duplicat this javascript function and the ajaxproxy to maintain the selection for multiple bound dropdowns --->
    <script type='text/javascript'>
	var hasRun = false;
	function selectDropDown(x,val) {
		if(!hasRun) {
			var dd = document.getElementById('CatID');
			for(var i = 0; i < dd.length; i++){
				if(dd.options[i].value == val){
					dd.selectedIndex = i;
				}
			}
		}
		hasRun = true;
	}		
	</script>
 
<!--- cfc bound to must return a two dimensonal array---> 
<!--- bind path is assuming cfc is in same directory as the form --->
<cfform>
Categories:<cfselect name="CatID" id="CatID" 
          bind="cfc:categories.getCategoriesBindable()" bindonload="true" />
 
<!--- now bind to the above selected value to return only albums based on your categories in the drop down 1 --->
Albums:<cfselect name="Albums" id="Albums" bind="cfc:categories.getAlbumsByCategory({Cat})" />
</cfform>
<!--- =end boundSelects.cfm --->
 
<!--- =start categories.cfc file --->
<!--- =CFC= create the categories.cfc and change cfc paths in form binds depending on where the cfc is located --->
<!--- the cfc for categories might look like this --->
<cfcomponent output="false">
 
<cffunction name="getCategoriesBindable" output="false" access="remote" returntype="array">
	<cfset var q="">
	<cfset var result=ArrayNew(2)>
	<cfset var i=0>
		
	<cfquery name="q" datasource="yourDSNHere">
		SELECT CatID, CatName
		FROM categories
		WHERE 0=0  
	</cfquery>
 
	<!--- Convert results to array --->
	<cfloop index="i" from="1" to="#q.RecordCount#">
		<cfset result[i][1]=q.CatID[i]>
		<cfset result[i][2]=q.CatName[i]>
	</cfloop>
			
	<cfreturn result>
		
</cffunction>
 
<cffunction name="getAlbumsByCategory" output="false" access="remote" returntype="array">
	<cfargument name="CatID" type="numeric" required="true" hint="Limit Albums by CatID argument">
	<cfset var q="">
	<cfset var result=ArrayNew(2)>
	<cfset var i=0>
		
	<cfquery name="q" datasource="yourDSNHere">
		SELECT AlbumID, AlbumName
		FROM albums
		WHERE 0=0
                AND CatID = <cfqueryparam value="#ARGUMENTS.CatID#" cfsqltype="CF_SQL_INTEGER">  
	</cfquery>
 
	<!--- Convert results to array --->
	<cfloop index="i" from="1" to="#q.RecordCount#">
		<cfset result[i][1]=q.AlbumID[i]>
		<cfset result[i][2]=q.AlbumName[i]>
	</cfloop>
			
	<cfreturn result>
		
</cffunction>
</cfcomponent>
<!--- =end boundSelects.cfm --->
 
	
                                              

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