function addLoadListener(fn){
if (typeof window.addEventListener != 'undefined'){window.addEventListener('load', fn, false);}
  else if (typeof document.addEventListener != 'undefined'){document.addEventListener('load', fn, false);}
  else if (typeof window.attachEvent != 'undefined'){window.attachEvent('onload', fn);}
  else{var oldfn = window.onload;if (typeof window.onload != 'function'){window.onload = fn;}
    else{window.onload = function(){oldfn();fn();};}}}