在新选项卡设置中使用IE7打开弹出窗口自定义弹出背景颜色

I have a pop up on my page that I want to have a white background if it is opened in a new tab according to the user's settings in IE7 to open pop ups in new tabs. Is it possible to customize this, or am I stuck with a black background. Also, can I set the position of the pop up if it is opened in a new tab.I have a pop up on my page that I want to have