String.prototype.trim = function() {
a = this.replace(/^\s+/, '');
return a.replace(/\s+$/, '');
};

var xmlHttp
var Bisbn;
var ChallanNum;
function checkISBN(uN,uE)
{ 
/*alert(uN);
alert(uE);*/
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 } 
var url="checkIsbn.php"
url=url+"?un="+uN
url=url+"&ue="+uE
url=url+"&sid="+Math.random()
xmlHttp.onreadystatechange=stateChanged 
xmlHttp.open("GET",url,true)
xmlHttp.send(null)
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
	//alert(xmlHttp.responseText);
	if(parseInt(xmlHttp.responseText)==1)
	{
		alert("Your Name is updated with respect to your Email id!");
		document.getElementById('uName').value="";
		document.getElementById('uEmail').value="";
	}
	else
	{
		alert("Your Name & Email id is added!");
		document.getElementById('uName').value="";
		document.getElementById('uEmail').value="";
	}
 } 
}

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;
}