function nav_enumeration () {
 	
	return new Array('home', 'rsvp', 'faq', 'participation_guidelines', 'contact');
 
 }
 
 function get_nav_layer_images() {
 		return document.images;
 }

 function nav_preload() {

	
	var nav_names = nav_enumeration();
	image_cache = new Array();
		
	for (index in nav_names) {
	
		var name = nav_names[index];
		var name_over = name + "_over";
		var name_out = name;
		var name_still = name;
		
		image_cache[name_over] = new Image();
		image_cache[name_over].src = "images/nav/" + name_over + ".gif";
		
		image_cache[name_out] = new Image();
		image_cache[name_out].src = "images/nav/" + name_out + ".gif";

		image_cache[name_still] = new Image();
		image_cache[name_still].src = "images/nav/" + name_still + ".gif";


	}
	
	// deal with png
	image_cache['white'] = new Image();
	image_cache['white'].src = "images/elements/box/white.png";
	
 	return 1;
 }

function nav_over(id) {

 //	var nav_images = get_nav_layer_images();
 
 	var fullname = id;
//	nav_images[fullname].src = image_cache[fullname + "-over"].src;
//	nav_images[fullname].src = "/images/" + fullname + "-over.gif";

	var img = document.getElementById(id);
	img.setAttribute("src", "images/nav/" + fullname + "_over.gif");

}

function nav_out(id) {
 	
// 	var nav_images = get_nav_layer_images();
 	var fullname = id;
// 	nav_images[fullname].src = image_cache[fullname + "-out"].src;
//	nav_images[fullname].src = "/images/" + fullname + "-out.gif";

	var img = document.getElementById(id);
	img.setAttribute("src", "images/nav/" + fullname + ".gif");

}


/* 

function msie_replace_png_imgs() {

	if (!is_msie()) return;

	var i, elements;

	elements = document.getElementsByTagName("img");
	for (i = 0; i < elements.length; i++) {
		var img = elements[i];
		if (img.src.toLowerCase().search(/\.png$/) < 0) continue;

		img.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + img.src  + "', sizingMethod='image')";
		img.src = "images/spacer.gif";

	}

	elements = document.getElementsByTagName("input");
	for (i = 0; i < elements.length; i++) {
		var input = elements[i];
		if (input.getAttribute("type") != "image") continue;
		if (input.getAttribute("src").toLowerCase().search(/\.png$/) < 0) continue;

		input.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + input.src  + "', sizingMethod='image')";
		input.src = "images/spacer.gif";
	}
	elements = document.getElementsByTagName("td");
	for (i = 0; i < elements.length; i++) {
		var td = elements[i];
		if (td.getAttribute("background").toLowerCase().search(/\.png$/) < 0) continue;

		td.style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + td.background  + "', sizingMethod='image')";
		td.background = "images/spacer.gif";
	}

}

function is_msie() {
		return navigator.userAgent.toLowerCase().indexOf("msie") != -1; 
}

*/