function getXMLHTTP() { //fuction to return the xml http object
		var xmlhttp=false;	
		try{
			xmlhttp=new XMLHttpRequest();
		}
		catch(e)	{		
			try{			
				xmlhttp= new ActiveXObject("Microsoft.XMLHTTP");
			}
			catch(e){
				try{
				req = new ActiveXObject("Msxml2.XMLHTTP");
				}
				catch(e1){
					xmlhttp=false;
				}
			}
		}
		 	
		return xmlhttp;
    }
	
	function getMericarmodel(makeId) {	
		
		document.getElementById('mericarModel').innerHTML='<img src="images/wait.gif" alt="Please Wait for AJAX Results">';
		var strURL="find_model.php?make="+makeId;
		var req = getXMLHTTP();
		
		if (req) {
			
			req.onreadystatechange = function() {
				if (req.readyState == 4) {
					// only if "OK"
					if (req.status == 200) {		
					//alert(req.responseText);				
						document.getElementById('mericarModel').innerHTML=req.responseText;						
					} else {
						alert("There was a problem while using XMLHTTP:\n" + req.statusText);
					}
				}				
			}			
			req.open("GET", strURL, true);
			req.send(null);
		}
		
	  		
	}
	
	
	function getDealer(cityId,makeId) {	
		
		
		document.getElementById('dealerdiv').innerHTML='<img src="images/wait.gif" alt="Please Wait for AJAX Results">';
		var strURL="find_dealer.php?cityId="+cityId+"&makeId="+makeId;
		var req = getXMLHTTP();
		
		if (req) {
			
			req.onreadystatechange = function() {
				if (req.readyState == 4) {
					// only if "OK"
					if (req.status == 200) {		
					//alert(req.responseText);				
						document.getElementById('dealerdiv').innerHTML=req.responseText;						
					} else {
						alert("There was a problem while using XMLHTTP:\n" + req.statusText);
					}
				}				
			}			
			req.open("GET", strURL, true);
			req.send(null);
		}
		  		
	}