function popup( url) {
	//alert( 'poptup');
	window.open( url, 'popup', 'width=550,height=705,directories=0,fullscreen=0,location=0,menubar=0,resizeable=0,scrollbars=1,status=0,titlebar=0,toolbar=0');
}

function unhide( elementID) {
	var element = document.getElementById( elementID);
	if( element)
		element.className = (element.className=='hidden')?'unhidden':'hidden';
}