isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"
isamap[2] = "_ot"
isamap[3] = "_dn"
function isimgact(id, act)
{
	if(document.images) document.images[id].src = eval( "isimages." + id + isamap[act] + ".src");
}
if (document.images) { // ensure browser can do JavaScript rollovers.
isimages = new Object();
isimages.go_df = new Image();
isimages.go_df.src = "images/go.gif";
isimages.go_ov = new Image();
isimages.go_ov.src = "images/goov.gif";
isimages.signup_df = new Image();
isimages.signup_df.src = "images/signup.gif";
isimages.signup_ov = new Image();
isimages.signup_ov.src = "images/signupov.gif";
isimages.signout_df = new Image();
isimages.signout_df.src = "images/signout.gif";
isimages.signout_ov = new Image();
isimages.signout_ov.src = "images/signoutov.gif";
isimages.send_df = new Image();
isimages.send_df.src = "images/send.gif";
isimages.send_ov = new Image();
isimages.send_ov.src = "images/sendov.gif";
}