if(document.images){
	preloadImages=new Array();
	for(i=0;i<9;i++){
		preloadImages[i]=new Image();
	}
	preloadImages[0].src="/images/ball3.gif";
	preloadImages[1].src="/images/bt_red3.gif";
	preloadImages[2].src="/images/bt_green3.gif";
	preloadImages[3].src="/images/bt_blue3.gif";
	preloadImages[4].src="/images/bt_cyan3.gif";
	preloadImages[5].src="/images/bt_magenta3.gif";
	preloadImages[6].src="/images/bt_yellow3.gif";
	preloadImages[7].src="/images/bt_black3.gif";
	preloadImages[8].src="/images/bt_orange3.gif";
}

function changeImage(name,flg){
	if(document.images){
		document.images[name].src=preloadImages[flg].src;
	}
}