if (document.images) {
		img1on = new Image();      
		img1on.src = "images/head_nav01_roll.gif"; 
		img2on = new Image(); 
		img2on.src = "images/head_nav02_roll.gif";  
		img3on = new Image();
		img3on.src = "images/head_nav03_roll.gif";
		img4on = new Image();
		img4on.src = "images/head_nav04_roll.gif";
		img5on = new Image();
		img5on.src = "images/head_nav05_roll.gif";
		img6on = new Image();
		img6on.src = "images/head_nav06_roll.gif";
		img7on = new Image();
		img7on.src = "images/head_nav07_roll.gif";
		img8on = new Image();
		img8on.src = "images/head_nav08_roll.gif";
         
		img1off = new Image(); 
		img1off.src = "images/head_nav01.gif"; 
		img2off = new Image();          
		img2off.src = "images/head_nav02.gif"; 
		img3off = new Image();
		img3off.src = "images/head_nav03.gif";
		img4off = new Image();
		img4off.src = "images/head_nav04.gif";
		img5off = new Image();
		img5off.src = "images/head_nav05.gif";
		img6off = new Image();
		img6off.src = "images/head_nav06.gif";
		img7off = new Image();
		img7off.src = "images/head_nav07.gif";
		img8off = new Image();
		img8off.src = "images/head_nav08.gif";
		} 
		
function imgOn(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "on.src");
		}
}
         
function imgOff(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "off.src");
		}
}

function redirect(){
    /*window.location = "index.html";*/
}