// JavaScript Document
var xmlHttp

function trim(str, chars) {
    return ltrim(rtrim(str, chars), chars);
}

function ltrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("^[" + chars + "]+", "g"), "");
}

function rtrim(str, chars) {
    chars = chars || "\\s";
    return str.replace(new RegExp("[" + chars + "]+$", "g"), "");
}

function ShowNameList(id_exam, stdname) {
	//alert("received: " + stdname + " with ID " + id_exam);
	if (stdname.length < 3) {
		alert("Please enter minimum 3 characters for name search.");
		return;
	}
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
		alert ("Browser does not support HTTP Request")
		return
	}
	document.getElementById("namesrchresults").innerHTML = "<center>Searching database. Please wait....</center>"
	var url="getnamelist.php"
	url=url+"?exam="+id_exam+"&name="+stdname
	url=url+"&sid="+Math.random()
	xmlHttp.onreadystatechange=stateChanged 
	xmlHttp.open("GET",url,true)
	xmlHttp.send(null)
}

function ShowNextNameList(id_exam, stdname, ll_startat) {
	xmlHttp=GetXmlHttpObject()
	if (xmlHttp==null) {
		alert ("Browser does not support HTTP Request")
		return
	}
	document.getElementById("namesrchresults").innerHTML = "<center>Searching database. Please wait....</center>"
	var url="getnamelist.php"
	url=url+"?exam="+id_exam+"&name="+stdname+"&startat="+ll_startat
	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") { 
		document.getElementById("namesrchresults").innerHTML=xmlHttp.responseText 
	} 
}
	
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;
}

function hidestatus(ls_msg){
	window.status=ls_msg
	return true
}