function checkNewMessage(num){
	MMObj = document.getElementById('NewMessage');
	//NMObj = document.getElementById('NewMessage');
	//if(MMObj && NMObj){
	if(MMObj){
		if(MMObj.style.display == 'none'){
			var xxHttp;
			if (window.XMLHttpRequest){
				xxHttp=new XMLHttpRequest()
			} else if (window.ActiveXObject) {
				xxHttp=new ActiveXObject("Microsoft.XMLHTTP");
			}
					
			if(xxHttp == null){
				alert ("Browser does not support HTTP Request")
			}else{	
				
				xxHttp.onreadystatechange = function(){
					if (xxHttp.readyState==4 || xxHttp.readyState=="complete"){ 
						//check message	
						counter = xxHttp.responseText;
						if(counter > 0){
							//MMObj.innerHTML = NMObj.innerHTML;
							MMObj.style.display = 'inline';
						}
					}
				}
				
				xxHttp.open('GET', '/checkNewMessage', true)
				xxHttp.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT");
				xxHttp.send(null);		
			}
		}		
	}
	
	if(num == 0){
		num = 150000;
	}else{
		num = num * 2;
	}

	setTimeout('checkNewMessage('+num+')', num);
}

setTimeout('checkNewMessage(0)', 5000);