// JavaScript Document
var xmlHttp;

function validateAbtanNo(str) { 

	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
	 alert ("Browser does not support HTTP Request");
	 return;
	}
	var url="validate_abtano.php";
	url=url+"?abtano="+str;
	xmlHttp.onreadystatechange=stateChanged;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() { 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
		if(xmlHttp.responseText == "exists") {
			document.getElementById("abtano").value="";
			document.getElementById("abtano_status").innerHTML="Abta number already registered with us";
			document.getElementById("abtano").focus();
			
		} else {
			document.getElementById("abtano_status").innerHTML=" ";
		}
	} 
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	try {
		// Firefox, Opera 8.0+, Safari
		xmlHttp=new XMLHttpRequest();
	} catch (e) {
		//Internet Explorer
		try {
			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e) {
			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
		}
	}
	return xmlHttp;
}