// JavaScript Document
 
var xhrLogin = false;

	function check_login(){
		
		
		
		if(window.XMLHttpRequest){
			
			try {
				
				xhrLogin = new XMLHttpRequest();
        	
			} catch(e) {
			
				xhrLogin = false;
        	
			}
		
		}else{
			
			try{
				
				xhrLogin = new ActiveXObject("Microsoft.XMLHTTP");
				
			}catch(e){
				
				xhrLogin = false;
			
			}
		
		}
		
		if(xhrLogin) {
		
		
			var username = document.getElementById("username").value;
			
			var password = document.getElementById("password").value;
			
			xhrLogin.onreadystatechange = process_login;
			
			xhrLogin.open("POST","check_login.php",true);
			
			xhrLogin.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); 
			
			xhrLogin.send("username="+username+"&password="+password+"&ajax=1");
		
		}else{
			
			alert("Some error occured.");
			
			//document.getElementById("login_message").innerHTML = "Some error occured.";
			
		}
		
	}
	
	
	function process_login(){
		
		
		if(xhrLogin.readyState == 4) {
			
			//document.getElementById("loading").style.visibility = "hidden";
			
			if(xhrLogin.status == 200){
				
				var pattern = /ERROR-/g;
				
				
				if(xhrLogin.responseText.match(pattern)) {
				
					//document.getElementById("ajaxmsg").style.visibility = "visible";
					//document.getElementById("closemsg").style.visibility = "visible";
					//document.getElementById("ajaxmsg").innerHTML = "<div style='margin-top:5px; margin-left:5px;'>"+xhrLogin.responseText.substr(6)+"</div>";	
					//document.getElementById("login_message").innerHTML = "";
					alert(xhrLogin.responseText.substr(6));
					document.getElementById("password").value = "";
					
					
				
				}else{
					
					
					window.location = "index.php";
					
					
				}
				
				
			//	document.getElementById("login_message").innerHTML = "";
				
			}else{
				
			//	document.getElementById("login_message").innerHTML = "Some error occured.";
			alert("Some error occured.");
				
			}
			
			
			
		}else{
			
			//document.getElementById("login_message").innerHTML = "<img src='images/loading.gif' align='absmiddle' vspace='0' hspace='0' border='0'>";
			
			//document.getElementById("login_message").innerHTML += xhrLogin.readyState ;	
			//document.getElementById("loading").style.visibility = "visible";
		}

		
	}