if(document.images){

issues_on = new Image();
issues_on.src = "images/issues_on.gif";

facts_on = new Image();
facts_on.src = "images/facts_on.gif";

forest_links_on = new Image();
forest_links_on.src = "images/links_on.gif";

members_on = new Image();
members_on.src = "images/members_on.gif";

contact_on = new Image();
contact_on.src = "images/contact_on.gif";


issues_off = new Image();
issues_off.src = "images/issues_off.gif";

facts_off = new Image();
facts_off.src = "images/facts_off.gif";

forest_links_off = new Image();
forest_links_off.src = "images/links_off.gif";

members_off = new Image();
members_off.src = "images/members_off.gif";

contact_off = new Image();
contact_off.src = "images/contact_off.gif";

}

function swapperon(ident){
document[ident].src = eval(ident + "_on" + ".src");
}

function swapperoff(ident){
document[ident].src = eval(ident + "_off" + ".src");
}