window.onresize = getWidth;
window.onload = getWidth;

function getWidth()
{
  wwidth = document.all.mydiv.scrollWidth;

  if(wwidth > 1220)
  {
	document.all.sstyle.href = '/styleh.css';
  }
  else
  {
	document.all.sstyle.href = '/stylel.css';
  }
}