if (document.images) {
b1_off = new Image(); b1_off.src="./images/but_1.jpg";
b1_over = new Image(); b1_over.src="./images/but_1_over.jpg";
b2_off = new Image(); b2_off.src="./images/but_2.jpg";
b2_over = new Image(); b2_over.src="./images/but_2_over.jpg";
b3_off = new Image(); b3_off.src="./images/but_3.jpg";
b3_over = new Image(); b3_over.src="./images/but_3_over.jpg";
b4_off = new Image(); b4_off.src="./images/but_4.jpg";
b4_over = new Image(); b4_over.src="./images/but_4_over.jpg";
b5_off = new Image(); b5_off.src="./images/but_5.jpg";
b5_over = new Image(); b5_over.src="./images/but_5_over.jpg";
b6_off = new Image(); b6_off.src="./images/but_6.jpg";
b6_over = new Image(); b6_over.src="./images/but_6_over.jpg";
b7_off = new Image(); b7_off.src="./images/but_7.jpg";
b7_over = new Image(); b7_over.src="./images/but_7_over.jpg";
b8_off = new Image(); b8_off.src="./images/but_8.jpg";
b8_over = new Image(); b8_over.src="./images/but_8_over.jpg";
b9_off = new Image(); b9_off.src="./images/but_9.jpg";
b9_over = new Image(); b9_over.src="./images/but_9_over.jpg";
}

function turn_off(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_off.src");
	}
}

function turn_over(ImageName) {
	if (document.images != null) {
		document[ImageName].src = eval(ImageName + "_over.src");
	}
}