JS判斷下拉框asp:DropDownList的那個選項被選中了

View Code

 1  function myClick() {
 2             var objDrp = document.getElementById('<% =ddlSP_TDEPT1.ClientID%>');
 3 
 4             var ID = objDrp.options[objDrp.selectedIndex].value;
 5             if (ID == "") {
 6                 alert("請選擇承辦單位！");
 7                 return false;
 8             }
 9             
10         }

View Code

1 <asp:DropDownList ID="ddlSP_TDEPT1" DataTextField="Name" DataValueField="code" runat="server"> </asp:DropDownList>