function popup(winX,winY,winURL)
	{
	posX = (scrX - winX) / 2;
	if (posX < 0) posX = 50;
	posY = (scrY - winY) / 2;
	if (posY < 0) posY = 50;
	if (document.layers && !document.getElementById)
		popwin = window.open (winURL,"popwin","innerwidth="+winX+",innerheight="+winY+",screenx="+posX+",screeny="+posY+",resizable=yes,scrollbars=no,toolbar=no,status=no,directories=no,menubar=no,location=no");
		else popwin = window.open (winURL,"popwin","top="+posY+",left="+posX+",width="+winX+",height="+winY+",resizable=no,scrollbars=no,toolbar=no,status=no,directories=no,menubar=no,location=no");
	popwin.focus()
	}