function chgimg(id,f){if((d=document.images)&&(typeof(d[id])=="object")){d[id].src="images/"+id+(f?"_":"")+".gif";}}
if (d=document.images)
	if (l=d.length) {
		for (i = 0; i<l; i++) {
			if (d[i].name) {
				d[d[i].name+"_"]=new Image;
				d[d[i].name+"_"].src="images/"+d[i].name+"_.gif";
			}
		}
	}