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.about_df = new Image();
	isimages.about_df.src = "/tartak/images/tartakabout_us.gif";
	
	isimages.about_ov = new Image();
	isimages.about_ov.src = "/tartak/images/tartakabout_usov.gif";
	
	isimages.staff_df = new Image();
	isimages.staff_df.src = "/tartak/images/tartakstaff.gif";
	
	isimages.staff_ov = new Image();
	isimages.staff_ov.src = "/tartak/images/tartakstaffov.gif";
	
	isimages.guide_df = new Image();
	isimages.guide_df.src = "/tartak/images/tartakguide_to__resources.gif";
	
	isimages.guide_ov = new Image();
	isimages.guide_ov.src = "/tartak/images/tartakguide_to__resourcesov.gif";
	
	isimages.howto_df = new Image();
	isimages.howto_df.src = "/tartak/images/tartakhow_to_get__materials.gif";
	
	isimages.howto_ov = new Image();
	isimages.howto_ov.src = "/tartak/images/tartakhow_to_get__materiaov.gif";
	
	isimages.events_df = new Image();
	isimages.events_df.src = "/tartak/images/tartakevents_____publicatio.gif";
	
	isimages.events_ov = new Image();
	isimages.events_ov.src = "/tartak/images/tartakevents_____publicatov.gif";
	
	isimages.links_df = new Image();
	isimages.links_df.src = "/tartak/images/tartakhotlinks1.gif";
	
	isimages.links_ov = new Image();
	isimages.links_ov.src = "/tartak/images/tartakhotlinks1ov.gif";
}