// JavaScript Document
sfHover = function() {
	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"), "");
		}
	}
}
if (window.attachEvent) window.attachEvent("onload", sfHover);

if (document.images) {
     button1 = new Image
     button1on = new Image
     button1.src = 'images/btn-why.gif'
     button1on.src = 'images/btn-why-on.gif'
	 button2 = new Image
     button2on = new Image
     button2.src = 'images/btn-about.gif'
     button2on.src = 'images/btn-about-on.gif'
	 button3 = new Image
     button3on = new Image
     button3.src = 'images/btn-contact.gif'
     button3on.src = 'images/btn-contact-on.gif'
	 button4 = new Image
     button4on = new Image
     button4.src = 'images/btn-products.gif'
     button4on.src = 'images/btn-products-on.gif'
 }