var aImg = new Array('nav_1_home', 'nav_2_contact', 'nav_3_hotlist', 'nav_4_resources', 'nav_5_forum');
var currImg;
var path = "/images/";
var init = false;

function roll_init()	{
	for (i = 0; i < aImg.length; i++)	{
		eval(aImg[i] + ' = new Image();');
		eval(aImg[i] + '.src = "' + path + aImg[i] + '_on.gif";');
	}
	init = true;
}

function roll_on(img)	{
	if(init)	{
		currImg = img.id;
		document.images[currImg].src = path + aImg[currImg.substring(3) -1] + '_on.gif';	
	}
}

function roll_off(img)	{
	document.images[currImg].src = path + aImg[currImg.substring(3) -1] + '.gif';
}