if (document.images) {

	
hom_on = new Image();
hom_off = new Image();
phi_on = new Image();
phi_off = new Image();
bio_on = new Image();
bio_off = new Image();
pas_on = new Image();
pas_off = new Image();
con_on = new Image();
con_off = new Image();
cur_on = new Image();
cur_off = new Image();

hom_on.src = "images/roll/hom_on.gif";
hom_off.src = "images/roll/hom_off.gif";
phi_on.src = "images/roll/phi_on.gif";
phi_off.src = "images/roll/phi_off.gif";
bio_on.src = "images/roll/bio_on.gif";
bio_off.src = "images/roll/bio_off.gif";
pas_on.src = "images/roll/pas_on.gif";
pas_off.src = "images/roll/pas_off.gif";
con_on.src = "images/roll/con_on.gif";
con_off.src = "images/roll/con_off.gif";
cur_on.src = "images/roll/cur_on.gif";
cur_off.src = "images/roll/cur_off.gif";		
}
function swapem(sname,rname) {
sname.src = rname.src;
}