function over(img,ref) { img.src = ref; }
function out(img,ref) { img.src = ref; }

var imgName = Array
(
	"image/bt_back_1.gif",
	"image/bt_back_2.gif",
	"image/bt_clear_1.gif",
	"image/bt_clear_2.gif",

	"image/bt_send_1.gif",
	"image/bt_send_2.gif",
	"image/bt_subscribe_1.gif",
	"image/bt_subscribe_2.gif"
);
var imgObj = Array();
for (var i = 0; i < imgName.length; i++)
{
	imgObj[i] = new Image;
	imgObj[i].src = imgName[i];
}