function resizeimg()
 {
   var obj = document.getElementById('vcontent'); 

  var target = obj.getElementsByTagName('img');
  var image_width = parseInt('660')
  var image_height = 0;

  for (i = 0;i < target.length; i++)
  {
   target[i].tmp_width = target[i].width;
   target[i].tmp_height = target[i].height;

   if (target[i].width > image_width)
   {
    image_height = parseFloat(target[i].width / target[i].height)
    target[i].width = image_width;
    target[i].height = parseInt(image_width / image_height);
   }
  }

}
 
 window.onload = resizeimg;