function initswap()
{
	if (document.getElementById)
		var x = document.getElementById('menu').getElementsByTagName('img');
	else if (document.all)
		var x = document.all['menu'].all.tags('img');
	else return;
	var preloads = new Object();
	for (var i=0;i<x.length;i++)
	{
		preloads['n'+x[i].id] = new Image;
		preloads['n'+x[i].id].src = 'menu/'+ x[i].id + '_off.jpg';
		preloads['o'+x[i].id] = new Image;
		preloads['o'+x[i].id].src = 'menu/'+ x[i].id + '_on.jpg';
		preloads['o'+x[i].id].onerror = function () {this.src='menu/menu1_off.jpg'}
		x[i].onmouseover = function () {this.src=preloads['o'+this.id].src;}
		x[i].onmouseout = function () {this.src=preloads['n'+this.id].src;}
	}
}