sfHover = function() {
	if (document.getElementById("nav"))
  {
    var sfEls = document.getElementById("nav").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"), "");
  		}
  	}
  }
}

calloutHover = function() {
	for (var cI=1 ; cI<=4 ; cI++) {
    if (document.getElementById("callout0" + cI))
    {
      var calloutObj = document.getElementById("callout0" + cI);
  		calloutObj.onmouseover=function() {
  			this.className+="Hover";
  		}
  		calloutObj.onmouseout=function() {
  			this.className=this.className.replace(new RegExp("Hover\\b"), "");
  		}
    }
  }
}

if (window.attachEvent) {
  window.attachEvent("onload", sfHover);
  window.attachEvent("onload", calloutHover);
}