function NewWindow(mypage, myname, w, h, scroll) {
	// ADD TO <A> TAG:  onClick="NewWindow(this.href,'pop','750','550','no');return false;"
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars='+scroll+''
	win = window.open(mypage, myname, winprops)
	if (parseInt(navigator.appVersion) >= 4) {
		win.window.focus();
	}
}

function toggleLayer(mylayer) {
	var myelement = document.getElementById(mylayer);
	myelement.style.display = (myelement.style.display != 'none' ? 'none' : '' );
}