var NAV_ID = "mainNav";
var DOM_OBJECTS = Array();
var nav_off_regex = /(.+)[0](\.gif)$/;

function initNavMouseovers() {
	var nav_images = Array();

	DOM_OBJECTS[NAV_ID] = document.getElementById(NAV_ID);
	nav_images = DOM_OBJECTS[NAV_ID].getElementsByTagName('img');

	for (var i=0; i< nav_images.length; i++) {
		if (!nav_off_regex.test(nav_images[i].src)) continue;

		nav_images[i].std_img = new Image();
		nav_images[i].std_img.src = nav_images[i].src;

		nav_images[i].hover_img = new Image();
		nav_images[i].hover_img.src = nav_images[i].src.replace(nav_off_regex, "$1" + "2" + "$2");

		nav_images[i].onmouseover = function() { this.src = this.hover_img.src; };
		nav_images[i].onmouseout = function() { this.src = this.std_img.src; };
	}

} // end initNavMouseovers()



onload_events = new Array();
onload_events[onload_events.length] = "initNavMouseovers()";

window.onload = function(){
	for (var i=0; i< onload_events.length; i++) {
		eval(onload_events[i]);
	}
};