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"), "");
		}
	}
}
preloadNav = function() {
	var imgArray = new Array("intro","home","explore","residential","commercial","retail","services","events","media","contact","directions");
	var subImgArray = new Array("aerials","maps","archplan","currentads","communication","telecomm");
	if (document.images) {
	/*PRELOAD MAIN NAV ITEMS*/
		for (var i=0; i < (imgArray.length); i++)	{
			myImg = new Image();
			myImg.src = "Images/" + imgArray[i] + "2.gif";
		}
		/*PRELOAD SUB NAV ITEMS*/
		for (var n=0; n < subImgArray.length; n++)	{
			mySubImg = new Image();
			mySubImg.src = "Images/Sub/" + subImgArray[n] + "2.gif";
		}
	}
}
if (window.attachEvent) {
	window.attachEvent("onload", sfHover);
	window.attachEvent("onload", preloadNav);
}