function act(picname) {
var tempa=document [picname].src;
var tempb=tempa.replace("_off.gif","_on.gif");
document [picname].src=tempb; }

function inact(picname) {
var tempa=document [picname].src;
var tempb=tempa.replace("_on.gif","_off.gif");
document [picname].src=tempb; }