The scroll bar is automatically displayed when the excess part is set in html.

In html pages, we sometimes need to automatically display the scroll bar when the content in the div exceeds the limit. We can set it as follows: [csharp] <div class = "classlist"> <div class = "autoScroll"> <asp: radioButtonList ID = "rblClasses" runat = "server" DataTextField = "className" DataValueField = "classID" ForeColor = "# FF4040"> </asp: radioButtonList> <br/> <asp: ImageButton ID = "imgSure" runat = "server" ImageUrl = "~ /Images/c_sure.jpg "/> <asp: ImageButton ID =" imgClose "runat =" server "ImageUrl = "~ /Images/c_close.jpg "/> </div> and set it in the style as follows: [css] <style type =" text/css ">. classlist {width: 300px; height: 20px ;}. autoScroll {width: 300px; height: 100px; overflow: auto ;}# after rblClasses {margin-left: 20px ;}</style> is set, when the content displayed in radiobutton exceeds the peripheral div, the scroll bar is automatically displayed, that is, the nested div.