function addLoadEvent(func) {
   var oldonload = window.onload;
   if (typeof window.onload != 'function') {
   window.onload = func;
   } else {
   window.onload = function() {
   oldonload();
   func();
   } } }

   function startSlideshow() {
   initSlideShow($('mySlideshow'), mySlideData);
   }
   addLoadEvent(startSlideshow);