function setupMenuImages () {
  for (i=1; document.getElementById ('mn'+i+'o'+1); ++i) {
	for (j=1; field=document.getElementById ('mn'+i+'o'+j); ++j) {
	  var onmouseout="this.src='"+field.src.toString ()+"'";
	  var onmouseover="this.src='"+field.src.toString ().replace (/\.gif/, 'a.gif')+"'";
	  if (('navigator' in window) && ('appName' in navigator) && /Internet Explorer/.test (navigator.appName)) {
		field.setAttribute ('onmouseover', new Function (onmouseover.replace (/this/, 'event.srcElement')));
		field.setAttribute ('onmouseout', new Function (onmouseout.replace (/this/, 'event.srcElement')));
	  }
	  else {
		field.setAttribute ('onmouseover', onmouseover);
		field.setAttribute ('onmouseout', onmouseout);
	  }
	}
  }
}