// opens a popup window
function PopupWindow (page) {
	win = window.open(page, "PopupWindow", 'width=500,height=400,left=0,top=0,scrollbars=yes,resizable=yes');
	if (win)
		win.focus();

	return false;
}

// toggles visibility on a block
// XXX not NS-safe yet
function ToggleVis (block) {
	var obj = document.getElementById(block);

	if (obj) {
		if (obj.style.visibility == "hidden") {
			obj.style.visibility = "visible";
			obj.style.display = "block";
		} else {
			obj.style.visibility = "hidden";
			obj.style.display = "none";
		}
	}
}