function gold1(id1,id2) {
 document.getElementById(id1).style.backgroundImage="url(pic/gold.jpg)";
 document.getElementById(id2).style.color="white";
} 
function gold2(id1,id2) {
 document.getElementById(id1).style.backgroundImage="url(pic/gold2.jpg)";
 document.getElementById(id2).style.color="#CC0000";
}