// JavaScript Document
var ns4 = (document.layers);
var ie4 = (document.all && !document.getElementById);
var ie5 = (document.all && document.getElementById);
var ns6 = (!document.all && document.getElementById);

function show(id){
	// Netscape 4
	if(ns4){
		document.layers[id].visibility = "show";
	}
	// Explorer 4
	else if(ie4){
		document.all[id].style.visibility = "visible";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		document.getElementById(id).style.visibility = "visible";
	}
}

function hide(id){
	// Netscape 4
	if(ns4){
		document.layers[id].visibility = "hide";
	}
	// Explorer 4
	else if(ie4){
		document.all[id].style.visibility = "hidden";
	}
	// W3C - Explorer 5+ and Netscape 6+
	else if(ie5 || ns6){
		document.getElementById(id).style.visibility = "hidden";
	}
}

<!-- preload images
if (document.images){
image1 = new Image(610,178);
image1.src = "graphics/hdrs/tom-bradfield-BC-SaanichNorththeIslands.png"
image2 = new Image(200,80);
image2.src = "graphics/bttns/join-button-200-81.png"
image3 = new Image(200,80);
image3.src = "graphics/bttns/volunteer-button-200-81.png"
image4 = new Image(200,80);
image4.src = "graphics/bttns/candidate-button-200-81.png"
image5 = new Image(240,60);
image5.src = "../graphics/bttns/economy-bttn-tom.png"
image6 = new Image(240,60);
image6.src = "../graphics/bttns/caring-bttn-tom.png"
image7 = new Image(240,60);
image7.src = "../graphics/bttns/environment-bttn-tom.png"
image8 = new Image(240,60);
image8.src = "../graphics/bttns/reform-bttn-tom.png"
image9 = new Image(240,60);
image9.src = "../graphics/bttns/local-bttn-tom.png"
image10 = new Image(240,60);
image10.src = "../graphics/bttns/donate-bttn-tom.png"

}