leCheckboxModifyEvent(event, checkbox){

    // If IE get the IE event object
   var e = event || window.event;

   // Check
   if( browser.attrName(e) == "aria-checked" ) {

    // update state image

    if (checkbox.node.getAttribute("aria-checked") == "true") 
      checkbox.image_node.src= "images/checked.gif";
    else
      checkbox.image_node.src= "images/unchecked.gif";

   }  // endif

    return browser.stopPropagation(e);

} // end handleCheckboxKeyDownEvent

/**
 * handleCheckboxKeyDownEvent pr