function PopUpImage(obj){

  x_size = obj.offsetWidth;
  y_size = obj.offsetHeight;

  window.open("popup.php?image="+obj+"&x_size="+x_size,
        "Eurostep",
        'menubar=no, toolbar=no, location=no, scrollbars=yes, resizable=yes, status=no, width='+x_size+', height=100');
}

sfHover = function() {
	var sfEls = document.getElementById("navigation").getElementsByTagName("LI");
	for (var i=0; i<sfEls.length; i++) {
		sfEls[i].onmouseover=function() {
			this.className+=" sfhover";
		}
		sfEls[i].onmouseout=function() {
			this.className=this.className.replace(new RegExp(" sfhover\\b"), "");
		}
	}
}

if (window.attachEvent) window.attachEvent("onload", sfHover);