$(document).ready(function(){
	
	setInterval(function(){
						 
			var timestamp = function()
			{
				return parseInt(new Date().getTime().toString().substring(0, 10));
			}			 
			
			$.ajax({
					type: "GET",
					url: "chkdate.php",
					data: "t="+timestamp,				
					success: function(msg){					
						$("time").html(msg);
					}
			});
	
	
	},900000);
	

	
	
});