var newwindow = '';

function popUp(strUrl, strName, strWidth, strHeight)
{
	if (newwindow.location && !newwindow.closed)
	{
		newwindow.location.href = strUrl;
		newwindow.focus();
	}
	else
	{
		newwindow=window.open(strUrl,strName,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,Width=' + strWidth + ',height=' + strHeight);

		if (!newwindow.opener) newwindow.opener = self;
	}
	if (window.focus) {newwindow.focus()}
}