// JavaScript Document
var xmlHttp;
var response;
var req;


function createXMLHttpRequest() {
    if (window.ActiveXObject) {
        req = new ActiveXObject("Microsoft.XMLHTTP");
    } 
    else if (window.XMLHttpRequest) {
        req = new XMLHttpRequest();
    }
}

function loadDropDownXML(input){
	
	createXMLHttpRequest();
	url  = '/mls/process/city.cfm?id=' + input;
    // branch for native XMLHttpRequest object
    if (window.XMLHttpRequest) {
        req.onreadystatechange = processDropDown;
        req.open("GET", url, true);
        req.send(null);
    // branch for IE/Windows ActiveX version
    } else if (window.ActiveXObject) {
        if (req) {
            req.onreadystatechange = processDropDown;
            req.open("GET", url, true);
            req.send();
        }
    }
}
 


//this is used to get the sub category info based on the first selected dropdown
function processDropDown() {
    // only if req shows "complete"
    if (req.readyState == 4) {
		// only if "OK"
        if (req.status == 200) {
			
			var dropForm = document.mlsSearch.subcity;
			//parse the xml document 
			var list = req.responseXML.getElementsByTagName('subcategory');
			
			//grab last inserted ID
			//var selectedDropDown = parseInt(document.mlsSearch.subindustryHolder.value);
			var currentdropNum = dropForm.options.length;
			
			 if(dropForm.options.length>=1){
			 	//remove elements from drop down menu
				for (x=dropForm.options.length; x>=0; x--){
                    dropForm.options[x]=null;	
            	} 
			 }
			for(var i=0; i<list.length; i++){
					//grab values from xml document	
					
					listOpt = document.createElement("option");
        			var catID = list[i].getAttribute("code");
					var ListName = list[i].getAttribute("name");
					
					listOpt.value = catID;
					listOpt.text = ListName;
					
					/*if(catID == selectedDropDown){
						listOpt.selected = "selected";
                	}*/
					dropForm.add(listOpt);
						
      			}
				PreselectMyItem();
			//clear drop down if there are no items to be selected
			
			
        } 
    }
}