if(document.images) {
hom_off = new Image();		hom_off.src = "images/roll/a.gif";
hom_on = new Image();		hom_on.src = "images/roll/aa.gif";
abo_off = new Image();		abo_off.src = "images/roll/b.gif";
abo_on = new Image();		abo_on.src = "images/roll/bb.gif";
sho_off = new Image();		sho_off.src = "images/roll/c.gif";
sho_on = new Image();		sho_on.src = "images/roll/cc.gif";
sto_off = new Image();		sto_off.src = "images/roll/d.gif";
sto_on = new Image();		sto_on.src = "images/roll/dd.gif";
pre_off = new Image();		pre_off.src = "images/roll/e.gif";
pre_on = new Image();		pre_on.src = "images/roll/ee.gif";
con_off = new Image();		con_off.src = "images/roll/f.gif";
con_on = new Image();		con_on.src = "images/roll/ff.gif";
crt_off = new Image();		crt_off.src = "images/roll/g.gif";
crt_on = new Image();		crt_on.src = "images/roll/gg.gif";
sal_on = new Image();		sal_on.src = "images/roll/sale_on.gif";
sal_off = new Image();		sal_off.src = "images/roll/sale_off.gif";
shp_off = new Image();		shp_off.src = "images/roll/start_a.gif";
shp_on = new Image();		shp_on.src = "images/roll/start_b.gif";
}
function swapem(sname,rname) {
sname.src = rname.src;
}