function popup(url,title,ww,wh){
	var w = window.open(url,title,'location=0,status=0,'+
			'width='+ww+',height='+wh+',menubar=no,resizable=yes,scrollbars=no,'+
			'left='+(screen.width-ww)/2+',top='+(screen.height-wh)/2);
	if(!w){
		alert('You need to disable popup blocking for this to work.');
	}else{
		w.focus();
	}
	return w;
}

function veil(){
	if( navigator.userAgent.indexOf("Apple")!=-1 ) return;
	document.getElementById('veil').style.display='block';
	// ie width fix
	if(document.all)
		document.getElementById('veil').style.width=document.body.offsetWidth+"px";
}
function unveil(){
	document.getElementById('veil').style.display='none';
}