JQuery plugin fancybox problem during postback

See more:

.NET3.5

ASP.NET

Javascript

.NET

I am using this Fancy box plugin to display a light box for confirm delete functionality.

function fancyConfirm(msg, callback)
     {
         var ret;
         jQuery.fancybox({
             modal: true,
             //  content: "<div style=\"margin:1px;width:240px;\">" + msg + "<div style=\"text-align:right;margin-top:10px;\"><input id=\"fancyConfirm_cancel\" style=\"margin:3px;padding:0px;\" type=\"button\" value=\"Cancel\"><input id=\"fancyConfirm_ok\" style=\"margin:3px;padding:0px;\" type=\"button\" value=\"Unfollow\"></div></div>",
             content: "<div id=\"unfollower\"><div><table class=\"light_marg\"><thead><tr><td colspan=\"2\">Unfollow Project</td></tr></thead><tbody><tr><td colspan=\"2\">Are you sure you want to unfollow this project?</td></tr><tr><td></td><td><input id=\"fancyConfirm_ok\" class=\"btn btn-primary btn-large\" type=\"button\" value=\"Unfollow\"><input id=\"fancyConfirm_cancel\" style=\"margin:3px;padding:0px;\" type=\"button\" value=\"Cancel\" class=\"btn btn-primary btn-large\"> </td></tr></tbody></table></div></div>",
             afterShow: function()
             {
                 $("#fancyConfirm_cancel").click(function()
                 {
                     ret = false;
                     jQuery.fancybox.close();
                 })
                 jQuery("#fancyConfirm_ok").click(function()
                 {
                     ret = true;
                     jQuery.fancybox.close();
                 })
             },
             afterClose: function()
             {
                 if (typeof callback == 'function')
                 {
                     callback.call(this, ret);

                 }
             }


             //              function()
             //              {
             //                  callback.call(this, ret);
             //              }
         });

     }

     function fancyConfirm_text()
     {
         var src ;
        fancyConfirm("Are you sure you want to unfollow this project?", function(ret)
         {
             alert((ret));
            // alert(src+'-'+ret);
             src= ret;

         });

This is my on button click code on asp.net

<asp:LinkButton ID="LnkBtnUnfollow" runat="server" CommandArgument ='<%# Eval("item_id")%>' OnClick="delete"   OnClientClick="return fancyConfirm_text(); " class="draft_link_tabs_but">Unfollow</asp:LinkButton>

So when i try to delete the particular row the page displays the light box for the confirmation i click yes/No but the page does not perform postback it is because i placed return false .