在我的html页面上滚动面板时，面板后面的内容也会滚动

I have used panel to display some specific info to users in my app. panel opens on click of button which is part of navigation bar.navigation bar is fixed in my html. Now when i open panel and scroll, content inside the panel scrolls which is expected but when i scroll the page behind the panel then that page also scrolls which i do not want. I tried with one trick of fixing the div behind the panel when panel is clicked but page looks odd after that. Anyone please help.I have used panel to display some specific info