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/photo_bottom02.gif";
         
		img1off = new Image(); 
		img1off.src = "images/head_nav01_off.gif"; 
		img2off = new Image();          
		img2off.src = "images/head_nav02_off.gif"; 
		img3off = new Image();
		img3off.src = "images/head_nav03_off.gif";
		img4off = new Image();
		img4off.src = "images/head_nav04_off.gif";
		img5off = new Image();
		img5off.src = "images/head_nav05_off.gif";
		img6off = new Image();
		img6off.src = "images/photo_bottom01.gif";
		} 
		
// Function to 'activate' images.  
function imgOn(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "on.src");
		}
}
         
// Function to 'deactivate' images.
function imgOff(imgName) {
		if (document.images) {
			document[imgName].src = eval(imgName + "off.src");
		}
}

function openpopup(popurl,dimensions){
	winpops=window.open(popurl,"",dimensions)
	}