前台调用后台控件

 <asp:DropDownList ID="ddlType" runat="server" Width="100px" onchange="Show(this.options[this.options.selectedIndex].value)" >
                        <asp:ListItem Value="1">年模型</asp:ListItem>
                        <asp:ListItem Value="2">季度模型</asp:ListItem>
                        <asp:ListItem Value="3">月模型</asp:ListItem>
                        <asp:ListItem Value="0">其他</asp:ListItem>
                    </asp:DropDownList>

 

 

 

 

<script language="javascript" type="text/javascript">
        function Show(value) {
            if (value == "1" || value == "0") {
                //年模型 || 其他
                document.getElementById("ddlSeason").style.display = "none";
                document.getElementById("ddlMonth").style.display = "none";
            }
            else if (value == "2") {
                //季度模型
                document.getElementById("ddlSeason").style.display = "";
                document.getElementById("ddlMonth").style.display = "none";
            }
            else {
                //value="3"
                //月模型
                document.getElementById("ddlSeason").style.display = "none";
                document.getElementById("ddlMonth").style.display = "";
            }
        }
    </script>