if (document.images) {
m_b1_off = new Image(); m_b1_off.src = "images/b1.gif"
m_b1_over = new Image(); m_b1_over.src = "images/b1off.gif"
m_b2_off = new Image(); m_b2_off.src = "images/b2.gif"
m_b2_over = new Image(); m_b2_over.src = "images/b2off.gif"
m_b3_off = new Image(); m_b3_off.src = "images/b3.gif"
m_b3_over = new Image(); m_b3_over.src = "images/b3off.gif"
m_b4_off = new Image(); m_b4_off.src = "images/b4.gif"
m_b4_over = new Image(); m_b4_over.src = "images/b4off.gif"
m_b5_off = new Image(); m_b5_off.src = "images/b5.gif"
m_b5_over = new Image(); m_b5_over.src = "images/b5off.gif"
m_b6_off = new Image(); m_b6_off.src = "images/b6.gif"
m_b6_over = new Image(); m_b6_over.src = "images/b6off.gif"
m_b7_off = new Image(); m_b7_off.src = "images/m7.gif"
m_b7_over = new Image(); m_b7_over.src = "images/m7off.gif"
m_b8_off = new Image(); m_b8_off.src = "images/m8.gif"
m_b8_over = new Image(); m_b8_over.src = "images/m8off.gif"
m_b9_off = new Image(); m_b9_off.src = "images/m9.gif"
m_b9_over = new Image(); m_b9_over.src = "images/m9off.gif"
m_b10_off = new Image(); m_b10_off.src = "images/m10.gif"
m_b10_over = new Image(); m_b10_over.src = "images/m10off.gif"
m_b11_off = new Image(); m_b11_off.src = "images/m11.gif"
m_b11_over = new Image(); m_b11_over.src = "images/m11off.gif"
m_b12_off = new Image(); m_b12_off.src = "images/m12.gif"
m_b12_over = new Image(); m_b12_over.src = "images/m12off.gif"
m_b13_off = new Image(); m_b13_off.src = "images/m13.gif"
m_b13_over = new Image(); m_b13_over.src = "images/m13off.gif"
m_b14_off = new Image(); m_b14_off.src = "images/m14.gif"
m_b14_over = new Image(); m_b14_over.src = "images/m14off.gif"
m_b15_off = new Image(); m_b15_off.src = "images/m15.gif"
m_b15_over = new Image(); m_b15_over.src = "images/m15off.gif"
m_b16_off = new Image(); m_b16_off.src = "images/m16.gif"
m_b16_over = new Image(); m_b16_over.src = "images/m16off.gif"
}

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");
	}
}