function IMGCACH () {
var RollImages,name,tmp;
RollImages=[];
for(tmp=1;tmp<3;++tmp) {
name="Index"+tmp;
RollImages[name]=new Image();
RollImages[name].src="/images/index_"+tmp+"b_on.gif";
}
return RollImages;
}

var Roll=IMGCACH();

function IndexRollin (id,Roll) {
var base="Index"+id;
document.images[base].src=Roll[base].src;
}

function IndexRollout (id) {
var base="Index"+id;
document.images[base].src="/images/index_"+id+"b_off.gif";
}