if (document.images) {
abo_on = new Image();	abo_on.src = "../images/roll3/about_on.gif";
abo_off = new Image();	abo_off.src = "../images/roll3/about_off.gif";
pro_on = new Image();	pro_on.src = "../images/roll3/programs_on.gif";
pro_off = new Image();	pro_off.src = "../images/roll3/programs_off.gif";
map_on = new Image();	map_on.src = "../images/roll3/map2_on.gif";
map_off = new Image();	map_off.src = "../images/roll3/map2_off.gif";
edu_on = new Image();	edu_on.src = "../images/roll3/edmat2_on.gif";
edu_off = new Image();	edu_off.src = "../images/roll3/edmat2_off.gif";
spt_on = new Image();	spt_on.src = "../images/roll3/support2_on.gif";
spt_off = new Image();	spt_off.src = "../images/roll3/support2_off.gif";
smt_on = new Image();	smt_on.src = "../images/roll3/summit_on.gif";
smt_off = new Image();	smt_off.src = "../images/roll3/summit_off.gif";
pub_on = new Image();	pub_on.src = "../images/roll3/pubs_on.gif";
pub_off = new Image();	pub_off.src = "../images/roll3/pubs_off.gif";
pre_on = new Image();	pre_on.src = "../images/roll3/press_on.gif";
pre_off = new Image();	pre_off.src = "../images/roll3/press_off.gif";
lin_on = new Image();	lin_on.src = "../images/roll3/links_on.gif";
lin_off = new Image();	lin_off.src = "../images/roll3/links_off.gif";
}
function swapem(sname,rname){
sname.src = rname.src;
}