if (document.images) {
hom_on = new Image();	hom_on.src = "images/roll/home_on.gif";
hom_off = new Image();	hom_off.src = "images/roll/home_off.gif";
abo_on = new Image();	abo_on.src = "images/roll/about_on.gif";
abo_off = new Image();	abo_off.src = "images/roll/about_off.gif";
tea_on = new Image();	tea_on.src = "images/roll/team_on.gif";
tea_off = new Image();	tea_off.src = "images/roll/team_off.gif";
com_on = new Image();	com_on.src = "images/roll/companies_on.gif";
com_off = new Image();	com_off.src = "images/roll/companies_off.gif";
foc_on = new Image();	foc_on.src = "images/roll/focus_on.gif";
foc_off = new Image();	foc_off.src = "images/roll/focus_off.gif";
nws_on = new Image();	nws_on.src = "images/roll/news_on.gif";
nws_off = new Image();	nws_off.src = "images/roll/news_off.gif";
con_on = new Image();	con_on.src = "images/roll/contact_on.gif";
con_off = new Image();	con_off.src = "images/roll/contact_off.gif";
pri_on = new Image();	pri_on.src = "images/roll/printer_on.gif";
pri_off = new Image();	pri_off.src = "images/roll/printer_off.gif";
}
function swapem(sname,rname) {
sname.src = rname.src;
}