// JavaScript Document
function lpmappic() {
open("lpmap.htm","map",["toolbar=no","width=425","height=640","scrollbars=no"])
}

		
<!-- see page 374 of 'Web Design in a Nutshell'-->

if (document.images) {

img1on = new Image();			//Active Images
img1on.src = "images/lefton1.gif";
img2on = new Image();			
img2on.src = "images/lefton2.gif";
img3on = new Image();			
img3on.src = "images/lefton3.gif";
img4on = new Image();			
img4on.src = "images/lefton4.gif";
img5on = new Image();			
img5on.src = "images/lefton5.gif";
img6on = new Image();			
img6on.src = "images/photoon.gif";
img7on = new Image();			
img7on.src = "images/ukmapsm_on.gif";


img1off = new Image();			//Inactive Images
img1off.src = "images/leftoff1.gif";
img2off = new Image();			
img2off.src = "images/leftoff2.gif";
img3off = new Image();			
img3off.src = "images/leftoff3.gif";
img4off = new Image();			
img4off.src = "images/leftoff4.gif";
img5off = new Image();			
img5off.src = "images/leftoff5.gif";
img6off = new Image();			
img6off.src = "images/photooff.gif";
img7off = new Image();			
img7off.src = "images/ukmapsm.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");
		}
}