function openPopup(strURL, strTarget, nWidth, nHeight)
{
	if(typeof(nWidth) != "number")
		nWidth = 235;
	if(typeof(nHeight) != "number")
		nHeight = 400;
	var strPosition = 'width=' + nWidth + ',height=' + nHeight + ',';
	if(window.screenLeft >= 0)
		strPosition += 'left=' + window.screenLeft + ',';
	if(window.screenTop >= 0)
		strPosition += 'top=' + window.screenTop + ',';
	window.open(strURL, strTarget, strPosition + 'toolbar=no,location=no,menubar=no,directories=no,status=no,resizable=yes,scrollbars=yes').focus();
}