/*
	Copyright David Trewern Design         :: www.dtdesign.com ::
	Unauthorised modification / use is a criminal offence, and
	will be prosecuted to the fullest extent permitted by law.
	All Rights Reserved
*/

// USE: call images 'swap_*_#.gif' in 'i' folder with:
// * = image name (must also be placed in NAVarr array below)
// # = image state : 0 = off, 1 = on

NAVarr = new Array("home", "company", "ourproducts", "news", "casestudies", "locate", "usedmachinery","contact", "clientlogin", "downloads", "spareparts", "enquiries", "updateregistration","hmft_she_1", "hmft_she_2", "hmft_she_3", "hmft_she_4", "hmft_rnd_1", "hmft_rnd_2", "hmft_rnd_3", "hmft_rnd_4", "hmft_rnd_5", "hmft_che_1", "hmft_che_2", "hmft_che_3", "hmft_che_4", "hmft_che_5");
if (document.images) {
	for (var NAVitem in NAVarr) { 
		 for (var NAVicount=0; NAVicount < 2; NAVicount++) { 
				eval("b" + NAVarr[NAVitem] + NAVicount + " = new Image()");
				eval("b" + NAVarr[NAVitem] + NAVicount + ".src = 'assets/swap_" + NAVarr[NAVitem] + "_" + NAVicount + ".gif'");
		 } 
	} 
}

function BturnOn(imageName) {
	if (document.images) { document [imageName].src = eval("b" +imageName + "1.src");   }
}

function BturnOff(imageName) {
	if (document.images) { document [imageName].src = eval("b" + imageName + "0.src");   }
}

var state = 'hidden';
var current = '';

function showhide(layer_ref) {
	if (current != '') {
		if (document.all) { //IS IE 4 or 5 (or 6 beta)
			eval( "document.all." + current + ".style.visibility = 'hidden'");
		}
		if (document.layers) { //IS NETSCAPE 4 or below
			document.layers[current].visibility = 'hidden';
		}
		if (document.getElementById && !document.all) {
			layer_x = document.getElementById(current);
			layer_x.style.visibility = 'hidden';
		}
		state = 'hidden';
	}

	if (layer_ref == current) {
		current = '';
	} else {
		if (state == 'visible') {
			state = 'hidden';
		}else {
			state = 'visible';
		}
		if (document.all) { //IS IE 4 or 5 (or 6 beta)
			eval( "document.all." + layer_ref + ".style.visibility = state");
		}
		if (document.layers) { //IS NETSCAPE 4 or below
			document.layers[layer_ref].visibility = state;
		}
		if (document.getElementById && !document.all) {
			layer_x = document.getElementById(layer_ref);
			layer_x.style.visibility = state;
		}
		
		current = layer_ref;
	}
}