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.davis10_df = new Image();
isimages.davis10_df.src = "../images/davishome.gif";

isimages.davis10_ov = new Image();
isimages.davis10_ov.src = "../images/davishomeov.gif";

isimages.davis11_df = new Image();
isimages.davis11_df.src = "../images/davisabout_the_author.gif";

isimages.davis11_ov = new Image();
isimages.davis11_ov.src = "../images/davisabout_the_authorov.gif";

isimages.davis12_df = new Image();
isimages.davis12_df.src = "../images/davistour_dates.gif";

isimages.davis12_ov = new Image();
isimages.davis12_ov.src = "../images/davistour_datesov.gif";

isimages.davis13_df = new Image();
isimages.davis13_df.src = "../images/davisguests.gif";

isimages.davis13_ov = new Image();
isimages.davis13_ov.src = "../images/davisguestsov.gif";

isimages.davis14_df = new Image();
isimages.davis14_df.src = "../images/davisbooksellers.gif";

isimages.davis14_ov = new Image();
isimages.davis14_ov.src = "../images/davisbooksellersov.gif";

isimages.davis15_df = new Image();
isimages.davis15_df.src = "../images/davisreviews.gif";

isimages.davis15_ov = new Image();
isimages.davis15_ov.src = "../images/davisreviewsov.gif";

isimages.davis25_df = new Image();
isimages.davis25_df.src = "../images/davisad_world.gif";

isimages.davis25_ov = new Image();
isimages.davis25_ov.src = "../images/davisad_worldov.gif";

isimages.davis4_df = new Image();
isimages.davis4_df.src = "../images/davisbridgett_m__davis.gif";

isimages.davis4_ov = new Image();
isimages.davis4_ov.src = "../images/davisbridgett_m__davisov.gif";

}