function DetectUnreadMessages(){
	$.ajax({
	   type: "POST",
	   url: "new_msg_check.php",
	   data: null,
	   cache: false,
	   success: function(html){
	   	 if (html != '0'){
	     	$('#msg_count').html(" ("+html+")");
	     } else {
	   	 	$('#msg_count').html('');
	   	 }
	     setTimeout('DetectUnreadMessages()' , 5000);
	   }
	});
}