if (document.images) {
	button_1_desc=new Image;
	button_1_desc.src="img/menu/man/big-ball-mia.gif";
	button_1_on=new Image;
	button_1_on.src="img/menu/man/small-ball1.gif";
	button_1_off=new Image;
	button_1_off.src="img/menu/org/small-ball1.gif";

	button_2_desc=new Image;
	button_2_desc.src="img/menu/man/big-ball-horse.gif";
	button_2_on=new Image;
	button_2_on.src="img/menu/man/small-ball2.gif";
	button_2_off=new Image;
	button_2_off.src="img/menu/org/small-ball2.gif";

	button_3_desc=new Image;
	button_3_desc.src="img/menu/man/big-ball-horse2.gif";
	button_3_on=new Image;
	button_3_on.src="img/menu/man/small-ball3.gif";
	button_3_off=new Image;
	button_3_off.src="img/menu/org/small-ball3.gif";

	button_4_desc=new Image;
	button_4_desc.src="img/menu/man/big-ball-house.gif";
	button_4_on=new Image;
	button_4_on.src="img/menu/man/small-ball4.gif";
	button_4_off=new Image;
	button_4_off.src="img/menu/org/small-ball4.gif";

}

function rollIn(imgName) {
	if (document.images) {
		document["description"].src = eval(imgName + "_desc.src");
		document[imgName].src = eval(imgName + "_on.src");
	}
}

function rollOut(imgName) {
	if (document.images) {
		document["description"].src = "img/menu/org/big-ball.gif";
		document[imgName].src = eval(imgName + "_off.src");
	}
}