var now = new Date();
var diff = now.getTime() - lastCacheTime.getTime();
var time = 3600000;
//time = 3600;
		
if(diff > time){
	//alert('cache check');
	jQuery.post ('/wp-admin/admin-ajax.php', {action: 'cache_check'}, function (response){
																		//alert (response); 
																	});
}else{
	
}
		//alert(lastCacheTime + " : "+ now);