button = new Image();
button.src = "images/pixel_trans.gif";
button_over = new Image();
button_over.src = "images/button_over.gif";

function swapimg(name,state) {
	if (state==1) {
		imgObj = "button_over";
	} else {
		imgObj = "button";
	}
	document.getElementById(name).src = eval(imgObj+".src");
}