$(document).ready(function(){
		$.ajaxSetup ({  
			cache: false,
			error:function(x,e){
				if(x.status==0){
					alert('You are offline!!\n Please Check Your Network.');
				} else if(x.status==404){
					alert('Requested URL not found.');
				} else if(x.status==500){
					alert('Internal Server Error.');
				} else if(e=='parsererror'){
					alert('Error.\nParsing JSON Request failed.');
				} else if(e=='timeout'){
					alert('Request Time out.');
				} else {
					alert('Unknown Error.\n'+x.responseText);
				}
			}
		});
});