if (document.images) {
    but1 = new Image(160,40);  but1.src = "buttons/w/w_b1.gif";
    but1m = new Image(160,40); but1m.src = "buttons/w/w_b1_over.gif";
    but2 = new Image(160,40);  but2.src = "buttons/w/w_b2.gif";
    but2m = new Image(160,40); but2m.src = "buttons/w/w_b2_over.gif";
    but3 = new Image(160,40);  but3.src = "buttons/w/w_b3.gif";
    but3m = new Image(160,40); but3m.src = "buttons/w/w_b3_over.gif";
    but4 = new Image(160,40);  but4.src = "buttons/w/w_b4.gif";
    but4m = new Image(160,40); but4m.src = "buttons/w/w_b4_over.gif";
    but5 = new Image(160,40);  but5.src = "buttons/w/w_b5.gif";
    but5m = new Image(160,40); but5m.src = "buttons/w/w_b5_over.gif";
    but6 = new Image(160,40);  but6.src = "buttons/w/w_b6.gif";
    but6m = new Image(160,40); but6m.src = "buttons/w/w_b6_over.gif";
    but7 = new Image(160,40);  but7.src = "buttons/w/w_b7.gif";
    but7m = new Image(160,40); but7m.src = "buttons/w/w_b7_over.gif";
    but8 = new Image(160,40);  but8.src = "buttons/w/w_b8.gif";
    but8m = new Image(160,40); but8m.src = "buttons/w/w_b8_over.gif";
 }
 function Change(Name, Src) {
  if (parseInt(navigator.userAgent.substring(8,9)) >= 3) {
    document[Name].src = eval(Src + ".src")
  }
 }