if (document.images) {

nav1_off = new Image(); nav1_off.src = "/images/nav1.gif"
nav1_over = new Image(); nav1_over.src = "/images/nav1_ov.gif"

nav2_off = new Image(); nav2_off.src = "/images/nav2.gif"
nav2_over = new Image(); nav2_over.src = "/images/nav2_ov.gif"

nav3_off = new Image(); nav3_off.src = "/images/nav3.gif"
nav3_over = new Image(); nav3_over.src = "/images/nav3_ov.gif"

nav4_off = new Image(); nav4_off.src = "/images/nav4.gif"
nav4_over = new Image(); nav4_over.src = "/images/nav4_ov.gif"

nav5_off = new Image(); nav5_off.src = "/images/nav5.gif"
nav5_over = new Image(); nav5_over.src = "/images/nav5_ov.gif"

nav6_off = new Image(); nav6_off.src = "/images/nav6.gif"
nav6_over = new Image(); nav6_over.src = "/images/nav6_ov.gif"

nav7_off = new Image(); nav7_off.src = "/images/nav7.gif"
nav7_over = new Image(); nav7_over.src = "/images/nav7_ov.gif"

nav8_off = new Image(); nav8_off.src = "/images/nav8.gif"
nav8_over = new Image(); nav8_over.src = "/images/nav8_ov.gif"

nav9_off = new Image(); nav9_off.src = "/images/nav9.gif"
nav9_over = new Image(); nav9_over.src = "/images/nav9_ov.gif"

nav10_off = new Image(); nav10_off.src = "/images/nav10.gif"
nav10_over = new Image(); nav10_over.src = "/images/nav10_ov.gif"

nav_ma_off = new Image(); nav_ma_off.src = "/images/nav_ma.gif"
nav_ma_over = new Image(); nav_ma_over.src = "/images/nav_ma_ov.gif"

}

function turn_off(ImageName)  {
	document[ImageName].src = eval(ImageName + "_off.src"); 
}
function turn_over(ImageName) {document[ImageName].src = eval(ImageName + "_over.src");}

function show() {	
		document.getElementById("subMenu").style.display='block';
		document['nav2'].src='img/nav2_ov.gif';
}	

function hide() {
	
		document.getElementById("subMenu").style.display='none';
		document['nav2'].src='img/nav2.gif';
	
}