// navisto scripts

var DOM = false;
var IE4 = false;
var NN4 = false;

var SubMenuLayerNames = new Array("NavigationAbout", "NavigationMusic", "NavigationJam", "NavigationJam04", "NavigationGraphics", "NavigationDIY", "NavigationMisc");

function getBrowser(){
	if (document.getElementById) {
	  DOM = true;
	} else if (document.layers) {
	  NN4 = true;
	} else if (document.all) {
	  IE4 = true;
	} 
}

function show_layer(layer){
	var x = 0;
	do {
		if (SubMenuLayerNames[x]) {
			if (DOM) document.getElementById(SubMenuLayerNames[x]).style.visibility="hidden";
			else if (IE4) document.all[SubMenuLayerNames[x]].style.visibility="hidden";
			else if (NN4) document.layers[SubMenuLayerNames[x]].visibility="hide";
			}
		x++;
		}
	while (SubMenuLayerNames[x]);
	
	if (DOM) document.getElementById(layer).style.visibility="visible";
	else if (IE4) document.all[layer].style.visibility="visible";
	else if (NN4) document.layers[layer].visibility="show";
}