function isMac() { return (navigator.userAgent.toLowerCase().indexOf('mac')!=-1); }
function isMSIE() { return (navigator.userAgent.toLowerCase().indexOf('msie')!=-1); }

/* Cross-browser Layer Object Begins */
function getLayer(lyr) {
	if(document.getElementById) return document.getElementById(lyr);
	if(document.layers) return document.layers[lyr];
	if(document.all) return document.all[lyr];
	return null;
}

function getLyrObj(lyr) {
	if(document.getElementById) return document.getElementById(lyr).style;
	if(document.layers) return document.layers[lyr];
	if(document.all) return document.all[lyr].style;
	return null;
}

function setStyle(el,name) {
	el.className=name;
}
/* Cross-browser Layer Object Ends */


/* Dynamic Subnav Begins */
var menu_top=139;
var menu_left=155;

function hideMenu() {
	menu=getLyrObj("what_lyr");
	blobber=getLyrObj("blobber_lyr");
	menu.visibility="hidden";
	blobber.visibility="hidden";
}

function subMenu() {
	menu=getLyrObj("what_lyr");
	blobber=getLyrObj("blobber_lyr");
	if(updateNav && !(isMac() && isMSIE()) && menu.visibility!="visible") {
		if(isMac()) {
			menu_top=133;
		}
		menu.top=menu_top;
		menu.left=menu_left;

		menu.visibility="visible";
		blobber.visibility="visible";
	}
}


var updateNav=false;
function setNav() { updateNav=true; }
window.onload=setNav;
/* Dynamic Subnav Ends */