Modals

$("#dialog").dialog({
      bgiframe: true,
      autoOpen: false,
      height: 600,
      width: 500,
      modal: true,
      buttons: {
         'Lend Asset': function() {
            $("#new_lending").submit();
            $(this).dialog('close');
         },
         Cancel: function() {
            $(this).dialog('close');
         }
      },
      close: function() {

      }
   });

   $("img.prsAssetImage").click(function(){
      var a_id = $(this).attr('id');
      a_id = a_id.replace("prs_", "");
      $("#dialog").load("lendings/new", {asset_id: a_id});


      //$.post("lendings/new", {asset_id: a_id});


      $("#dialog").dialog('open');
   });


http://jqueryui.com/demos/dialog/#modal-form