isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"

function isimgact(id, act)
{
	if(document.images) document.images[id].src = eval( "isimages." + id + isamap[act] + ".src");
}
if (document.images) { // ensure browser can do rollovers.

isimages = new Object();
isimages.menu_df = new Image();
isimages.menu_df.src = "../buttons/b11.gif";
isimages.menu_ov = new Image();
isimages.menu_ov.src = "../buttons/b12.gif";

isimages.menu1_df = new Image();
isimages.menu1_df.src = "../buttons/b21.gif";
isimages.menu1_ov = new Image();
isimages.menu1_ov.src = "../buttons/b22.gif";

isimages.menu2_df = new Image();
isimages.menu2_df.src = "../buttons/b31.gif";
isimages.menu2_ov = new Image();
isimages.menu2_ov.src = "../buttons/b32.gif";
}