Dropdownlist样式设置

<span   style="BORDER-RIGHT:green   1px   solid;   BORDER-TOP:green   1px   solid;   OVERFLOW:hidden;   BORDER-LEFT:green   1px   solid;   BORDER-BOTTOM:green   1px   solid;   POSITION:absolute">  
  <asp:DropDownList   id="DropDownList1"   style="MARGIN:-2px"   runat="server"></asp:DropDownList>  
  </span>