function popup(sUrl, sName, iWidth, iHeight, sScroll) {
		var iLeft = (screen.width - iWidth) / 2;
		var iTop = (screen.height - iHeight) / 2;
		sProps = 'height='+iHeight+',width='+iWidth+',top='+iTop+',left='+iLeft+',scrollbars='+sScroll;
		win = window.open(sUrl, sName, sProps)
		if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}