How to access a variable used in java script from jsp page?

Question

I am using ajax in my web page.I want to access a variable used in java script function (in head section of html) by a jsp page.Jsp page is retrieving data from database using that variable.

How can i do that?

Please help me.

Answer 1

if you need the call data you will set & or have a var that's empty before hand. what I realized is that ajax localizes even declared new var's the best way i've found is to append to a existing. Now with the new string and or literal array / object

 <script>
     function s(e){
      alert(e);
     }

      var a = '';

    //Jquery Version
     $.get('test.php',function(data){
       a += data;
      s(a);
      });

    // Javascript Version
      function ajaxFunction(){
        var ajaxRequest;  // The variable that makes Ajax possible!

        try{
            // Opera 8.0+, Firefox, Safari
            ajaxRequest = new XMLHttpRequest();
        } catch (e){
            // Internet Explorer Browsers
            try{
                ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
                try{
                    ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
                } catch (e){
                    // Something went wrong
                    alert("Your browser broke!");
                    return false;
                }
            }
        }
        // Create a function that will receive data sent from the server
        ajaxRequest.onreadystatechange = function(){
            if(ajaxRequest.readyState == 4){

                a += ajaxRequest.responseText;
                s(a);
            }
        }

        ajaxRequest.open("GET", "test.php" , true);
        ajaxRequest.send(null); 
    }

    $(function(){
    ajaxFunction();
    });
    //-->
    </script>