Question

var display_message="";
            $('input:checked').each(function(index) {

               var profile_id=$(this).val();
                $.ajax({
                            type: 'post',
                            url: 'myUrl',
                            data: data,
                            success: function(data) {
                                if(data=="ok")
                                    display_message = display_message + data +", ";
                            }
                    });
           });

           alert(display_message);
           alert(display_message);

           if($.trim(display_message)!=""){
                jAlert("Your birthdate already exits in "+display_message.substring(0, display_message.length - 2)+".", "Bdate");
                 return false;
           }

in this code, i use two alert-box for display display_message variable value.
when i run successfully this code, in 1st alert-box i get blank value and second alert-box i get value which i needed, then it will go in if condition.
if i doesn’t use alert box then it will always take null value in display_message variable and never enters into the if condition. so what i need to change to run this code without alert box?

Answer 1

You are making an asynchronous call via AJAX, but your code is executing synchronously. So it is returning before the AJAX call completes. The first alert box just gives the function time to catch up. You need to handle all this code in your success callback.

    var display_message="";
    $('input:checked').each(function(index) {

       var profile_id=$(this).val();
        $.ajax({
                    type: 'post',
                    url: 'myUrl',
                    data: data,
                    success: function(data) {
                        if(data=="ok")
                            display_message = display_message + data +", ";
                        if($.trim(display_message)!=""){
                           jAlert("Your birthdate already exits in "+display_message.substring(0, display_message.length - 2)+".", "Bdate");
         return false;
                    }
            });
   });