//declaring variables
if(document.getElementById){
	var ns6 = (document.all)?0:1;
}
var ns = (document.layers)?1:0;
var agt=navigator.userAgent.toLowerCase();
var mac=(agt.indexOf("mac")!=-1);

lyrs = new Array(3);
lyrs[0] = "copper_on";
lyrs[1] = "brass_on";
lyrs[2] = "bronze_on";

var left_submenu_image = 482;
var top_submenu_image = 136;
var left_submenu_lyr = 482;
var top_submenu_lyr = 152;

//functions

// function show_submenu()
function show_submenu(lyr) {
	var lyr_image, lyr_submenu;
	lyr_image = lyr + '_img';
	lyr_submenu = lyr + '_lyr';
	
	setVis("outerLayer", 1);
	hideMenus(0);
	setPos(lyr_image, left_submenu_image, top_submenu_image)
	setVis(lyr_image, 1);
	setPos(lyr_submenu, left_submenu_lyr, top_submenu_lyr);
	setVis(lyr_submenu, 1);
} 
///

// function hideMenus()
function hideMenus(hides_outerLayer) {

	if (hides_outerLayer) {
	setTimeout("setVis('outerLayer', 0)", 500);
	}
	
	for (i=0;i<3;i++) {
	lyr = lyrs[i];
	setVis (lyr + '_img' , 0);
	setVis (lyr + '_lyr' , 0);
	}
}
///

// function setPos()
function setPos(lyr,x,y){
	if(ns){
		if(x)eval("document."+lyr+".left = "+x);
		if(y)eval("document."+lyr+".top = "+y);
	} else if(ns6){
		if(x)eval("document.getElementById('"+lyr+"').style.left = "+x+"+\"px\"");
		if(y)eval("document.getElementById('"+lyr+"').style.top = "+y+"+\"px\"");
	} else if (document.all)
	{
		if(x)eval("document.all."+lyr+".style.left = "+x);
		if(y)eval("document.all."+lyr+".style.top = "+y);
	}
}
///

// function setVis
function setVis(lyr,vis){

	var sVis;
	if(ns){
		sVis = (vis)?'show':'hide';
		eval("document."+lyr+".visibility = '"+sVis+"'");
	} else if(ns6){
		sVis = (vis)?'visible':'hidden';
		eval("document.getElementById('"+lyr+"').style.visibility = '"+sVis+"'");
	} else if(document.all) {
		sVis = (vis)?'visible':'hidden';
		eval("document.all."+lyr+".style.visibility = '"+sVis+"'");
	}
}
///