function fnOpenPopup(_strURL,_iWidth,_iHeight,_strScrolling)
{
	if(document.all)
		var xMax = screen.width, yMax = screen.height;
	else if(document.layers)
		var xMax = window.outerWidth, yMax = window.outerHeight;
	else
		var xMax = 640, yMax=480;

	var xOffset = (xMax - _iWidth) / 2;
	var yOffset = (yMax - _iHeight) / 2;
	var strFeatures = "scrollbars= " + _strScrolling + ",width=" + _iWidth + ",height=" + _iHeight + ",";

    window.open(_strURL,'',strFeatures + 'screenX=' + xOffset + ',screenY=' + yOffset + ',top=' + yOffset + ',left=' + xOffset + '');
}