isamap = new Object();
isamap[0] = "_df"
isamap[1] = "_ov"
function isimgact(id, act)
{
        if(document.images) document.images[id].src = eval( "gra." + id + isamap[act] + ".src");
}
if (document.images) {
gra = new Object();
gra.htm0_df = new Image();
gra.htm0_df.src = "menu/htm0.gif";
gra.htm0_ov = new Image();
gra.htm0_ov.src = "menu/htm0ov.gif";
gra.htm1_df = new Image();
gra.htm1_df.src = "menu/htm1.gif";
gra.htm1_ov = new Image();
gra.htm1_ov.src = "menu/htm1ov.gif";
gra.htm2_df = new Image();
gra.htm2_df.src = "menu/htm2.gif";
gra.htm2_ov = new Image();
gra.htm2_ov.src = "menu/htm2ov.gif";
gra.htm4_df = new Image();
gra.htm4_df.src = "menu/htm4.gif";
gra.htm4_ov = new Image();
gra.htm4_ov.src = "menu/htm4ov.gif";
}