//预载图片
var myimages=new Array()
function preloadimages(){
for (i=0;i<preloadimages.arguments.length;i++){
myimages[i]=new Image()
myimages[i].src=preloadimages.arguments[i]
}
}

preloadimages("/images/ico_download.png","/images/ico_software.png","/images/ico_hardware.png","/images/ico_general.png","/images/ico_sort.png","/images/label_on_0.gif","/images/label_on_1.gif","/images/label_on_2.gif","/images/label_off.png")