function Window_Open(windowName, URL, targetName, windowWidth, windowHeight, windowFeatures)	{
	str = 'width=' + windowWidth + ',height=' + windowHeight;
	str = str + ",";
	str = str + "left=" + (screen.width / 2 - windowWidth / 2) + ",top=" + (screen.height / 2 - windowHeight / 2 - 40);
	if (windowFeatures != null)
		str = str + ",";
	windowFeatures = str + windowFeatures;
	eval(windowName + "=window.open('" + URL + "','" + targetName + "','" + windowFeatures + "')");
}