<!--
function preloadImages() {
if (document.images) {
		tnav_fema_over = new Image();
		tnav_fema_over.src="/images/tnav_fema_over.gif"
		tnav_hcfcd_over = new Image();
		tnav_hcfcd_over.src="/images/tnav_hcfcd_over.gif"
		tnav_contact_over = new Image();
		tnav_contact_over.src="/images/tnav_contact_over.gif"
		tnav_site_over = new Image();
		tnav_site_over.src="/images/tnav_site_over.gif"
		tnav_gloss_over = new Image();
		tnav_gloss_over.src="/images/tnav_gloss_over.gif"
		tnav_search_over = new Image();
		tnav_search_over.src="/images/tnav_search_over.gif"
	}
}

var pathOfImg = "/images/";
if (document.images)	{ 
	function buttonOn(imgName) {
	    document.images[imgName].src= pathOfImg + imgName + "_over.gif"
	}
	  
	function buttonOff(imgName) {
	    document.images[imgName].src= pathOfImg + imgName + ".gif"
	}
}
// -->