jquery modal return value

fififlowertot

have a jquery on my aspx page which loads a seperate aspx page through iframe inside a jquery modal. I am passing the the value of a textbox to the jquery-modal. Now I have a gridview in modal popup and evrytime i select a row I want to return those values back to base(parent page and populate some textboxes with gridview row in modal. I am unable pass values back to base page. my jquery is as below:-

$(function() {
/* Modal Dialog Box Configuration */

    $("#addForm").dialog({

        autoOpen: false,
        modal: true,
        width: 500,
        scroll: true,
        overlay: {
            "background-color": "#000",
            "opacity": "0.5",
            "-moz-opacity": "0.5"
        }
    });



    $("#btnAddSession").click(function(event) {
        var url = "Result.aspx?key=" + encodeURIComponent($("#<%= txtSearch.ClientID %>").val());
        alert(url);
        $("#popup").attr("src", url);
        $("#addForm").dialog("open");

       //event.preventDefault();

        return false;
    });

});

my div is as below:-

This opens the new aspx in the jquery modal and passes the value of textbox which i access serverside to perform my search and bing to gridview. But unable to pass values back to base page.