// JavaScript Document
var xmlHttp;
var spanid;

// page = Page name, where to be the checking will be done.
// sp = span id where the comment will be placed.
// checkfield = the field id which will be evaluated.
function isavailable(page,sp,checkfield)
{ 
	str = document.getElementById(checkfield).value;
	spanid=sp;
	document.getElementById(sp).innerHTML = "";
	if (str.length > 0)
	{ 
		var url=page+"?sid=" + Math.random() + "&idchk" + "&q=" + str;
		xmlHttp=GetXmlHttpObject(stateChanged);
		xmlHttp.open("GET", url , true);
		xmlHttp.send(null);
	} 
	else
	{ 
		document.getElementById(spanid).innerHTML="";
		alert("- Please insert Login ID of your choice.");
	} 
} 
function stateChanged() 
{
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
		document.getElementById(spanid).innerHTML=xmlHttp.responseText;
} 
function GetXmlHttpObject(handler)
{ 
	var objXmlHttp=null
	
	if (navigator.userAgent.indexOf("Opera")>=0)
	{
		alert("Oops! Can't check in Opera!") 
		return 
	}
	if (navigator.userAgent.indexOf("MSIE")>=0)
	{ 
		var strName="Msxml2.XMLHTTP"
		if (navigator.appVersion.indexOf("MSIE 5.5")>=0)
		{
			strName="Microsoft.XMLHTTP"
		} 
		try
		{ 
			objXmlHttp=new ActiveXObject(strName)
			objXmlHttp.onreadystatechange=handler 
			return objXmlHttp
		} 
		catch(e)
		{ 
			alert("Error. Scripting for ActiveX might be disabled") 
			return 
		} 
	} 
	if (navigator.userAgent.indexOf("Mozilla")>=0)
	{
		objXmlHttp=new XMLHttpRequest()
		objXmlHttp.onload=handler
		objXmlHttp.onerror=handler 
		return objXmlHttp
	}
}