var sections = new Array('home', 'about', 'services','clients','contact');
if (document.images){
	var imgCache = new Array();
	// section 0
	var secName;
	for (i=0;i<sections.length;i++){
		secName = sections[i];
		imgCache[secName+'_off'] = new Image();
		imgCache[secName+'_off'].src = "images/nav_"+secName+"_off.gif";
		imgCache[secName+'_over'] = new Image();
		imgCache[secName+'_over'].src = "images/nav_"+secName+"_over.gif";
	}

}


function swapImage(strImageName, strImageCacheName){
	if (document.images){
		var imgObj = document.images[strImageName];
		var newSrc = imgCache[strImageCacheName].src;
		imgObj.src = newSrc;
	}
}