// JavaScript Document
var url = "classes/checkUsernameAvailability.php?id="; // The server-side script
   function handleHttpResponse() {	
		if (http.readyState == 4) 
		{
			if(http.status==200) {
				var results=http.responseText;
				document.getElementById('dynamicResult').innerHTML = results;
			}
		}
		else
		{
			document.getElementById('dynamicResult').innerHTML = '<img src=../images/indicator.gif>';
		}
	}
		
	function requestCustomerInfo() 
	{      
		var sId = document.getElementById("txtCustomerId").value;
		http.open("GET", url + escape(sId), true);
		http.onreadystatechange = handleHttpResponse;
		http.send(null);
	}
	
	function getHTTPObject() 
	{
		var xmlhttp;
	  	if(window.XMLHttpRequest)
		{
			xmlhttp = new XMLHttpRequest();
	  	}
	  	else if (window.ActiveXObject)
		{
			xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
			if (!xmlhttp)
			{
				xmlhttp=new ActiveXObject("Msxml2.XMLHTTP");
			}
		}
  		return xmlhttp;
	}
	var http = getHTTPObject();