function selectModels(FormField,SearchMakeDesc,ModelField,stylecode,CondenseLevel,loader)
		{
    src = document[FormField];
    srcModel = src[ModelField];
    for(i = srcModel.length - 1; i >= 1; i--) {
      srcModel.options[i] = null;
    }
			var req = (window.XMLHttpRequest)
				?
				new XMLHttpRequest()
				:
				((window.ActiveXObject)
				?
				new ActiveXObject("Microsoft.XMLHTTP")
				:
				false
				);
				
				if(typeof(loader) != 'undefined'){
				// get element position
				var coord = GetElementAbsolutePos(document.getElementById(ModelField));
				loaderPic = document.getElementById(loader);
				loaderPic.style.display='block';
				loaderPic.style.left=(coord.x + 2) + 'px';
				loaderPic.style.top=(coord.y + 2 )+ 'px';}
				SearchMakeDesc = encodeURI(SearchMakeDesc);
			req.open ("GET","/customTags/ct_json_models.cfm?make=" + SearchMakeDesc + "&stylecode=" + stylecode + "&condenselevel=" + CondenseLevel,true);
			req.onreadystatechange = function()
			{
				if(req.readyState == 4)
				{
					if(req.status == 200)
					{
          var models = eval('(' + req.responseText + ')');
        for(i=0;i<models.data.modeldesc.length;i++){
          var fm = srcModel.options;
          fm[fm.length] = new Option(models.data.modeldesc[i], models.data.modeldesc[i]);
        }
					if(typeof(loader) != 'undefined'){
						loaderPic.style.display='none';
						}
					}
				}
			}
			req.send(null)
		}
		
		
	function GetElementAbsolutePos(element) {
	var res = new Object();
	res.x = 0; res.y = 0;
	if (element !== null) {
		res.x = element.offsetLeft;
		res.y = element.offsetTop;

		var offsetParent = element.offsetParent;
		var parentNode = element.parentNode;

		while (offsetParent !== null) {
			res.x += offsetParent.offsetLeft;
			res.y += offsetParent.offsetTop;

			if (offsetParent != document.body && offsetParent != document.documentElement) {
				res.x -= offsetParent.scrollLeft;
				res.y -= offsetParent.scrollTop;
			}
			//next lines are necessary to support FireFox problem with offsetParent
			if(navigator.family == 'gecko') {
				while (offsetParent != parentNode && parentNode !== null) {
					res.x -= parentNode.scrollLeft;
					res.y -= parentNode.scrollTop;
					parentNode = parentNode.parentNode;
				}
			}
			parentNode = offsetParent.parentNode;
			offsetParent = offsetParent.offsetParent;
		}
	}
	return res;
}