Menu background images flicker in IE6

Menu background images flicker in IE6

1 try { 
2 document.execCommand('BackgroundImageCache', false, true); 
3 } catch(e) {} 

http://l.yimg.com/tw.yimg.com/i/tw/auction/lsm_external/lsm_auction_080124.js

/* Fix to Improve IE6 */
if(document.uniqueID && !window.XMLHttpRequest){
    try {
     document.execCommand('BackgroundImageCache',false,true);
 }
 catch(e){
 };
};