var preloadimages=new Array("buttons/home.gif","buttons/home_mouseover.gif","buttons/home_mouseclick.gif");
var images=new Array();
for (p=0;p<preloadimages.length;p++)
{
	images[p] = new Image();
	images[p].src = preloadimages[p];
}
function roll(img_name, img_src)
{
	document.getElementById(img_name).src = img_src;
}