if(document.images){
	var changeimgs=new Array();
	changeimgs[0]=new Image();changeimgs[0].src="/img/banner_logo_over.gif";
	changeimgs[1]=new Image();changeimgs[1].src="/img/link_icon_sitetop_over.gif";
	changeimgs[2]=new Image();changeimgs[2].src="/img/link_icon_pagetop_over.gif";
}
function changeimg(imgname,filename){
	if(document.images){
		document.images[imgname].src=filename;
	}
}