$j(document).ready(function($){


  if (window.DD_belatedPNG)
    DD_belatedPNG.fix('.pngimg');


  var tmpalt;
  $("img").hover( 
    function(){ tmpalt = $(this).attr( "alt" ); $(this).attr( "alt", "" ); },
    function(){ $(this).attr( "alt", tmpalt ); });

});