$().ready(function(){
    $.ajaxSetup({
        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('Internel Server Error.');
            }else if(e=='parsererror'){
            alert('Error.nParsing JSON Request failed.');
            }else if(e=='timeout'){
            alert('Request Time out.');
            }else {
            alert('Unknow Error.n'+x.responseText);
            }
        }
    });
});