if (document.images) {
	var imgchang=new Array();
	imgchang[0]=new Image(),imgchang[0].src="img001/null.gif";
	imgchang[1]=new Image(),imgchang[1].src="img001/gt_b01.gif";
	imgchang[2]=new Image(),imgchang[2].src="img001/gt_b02.gif";
	imgchang[3]=new Image(),imgchang[3].src="img001/gt_b03.gif";
	imgchang[4]=new Image(),imgchang[4].src="img001/gt_b04.gif";
}

function chim(name,num) {
	if (document.images) document.images[name].src=imgchang[num].src;
}