if (document.images) {
index_b1_off = new Image(); index_b1_off.src = "buttons/index_b1.gif"
index_b1_over = new Image(); index_b1_over.src = "buttons/index_b1_over.gif"
index_b2_off = new Image(); index_b2_off.src = "buttons/index_b2.gif"
index_b2_over = new Image(); index_b2_over.src = "buttons/index_b2_over.gif"
index_b3_off = new Image(); index_b3_off.src = "buttons/index_b3.gif"
index_b3_over = new Image(); index_b3_over.src = "buttons/index_b3_over.gif"
index_b4_off = new Image(); index_b4_off.src = "buttons/index_b4.gif"
index_b4_over = new Image(); index_b4_over.src = "buttons/index_b4_over.gif"
index_b5_off = new Image(); index_b5_off.src = "buttons/index_b5.gif"
index_b5_over = new Image(); index_b5_over.src = "buttons/index_b5_over.gif"
index_b6_off = new Image(); index_b6_off.src = "buttons/index_b6.gif"
index_b6_over = new Image(); index_b6_over.src = "buttons/index_b6_over.gif"
index_b7_off = new Image(); index_b7_off.src = "buttons/index_b7.gif"
index_b7_over = new Image(); index_b7_over.src = "buttons/index_b7_over.gif"
index_back_off = new Image(); index_back_off.src = "buttons/index_back.jpg"
index_back_over = new Image(); index_back_over.src = "buttons/index_back_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");
	}
}