asp.net+JS客户端验证

 

<script>

        function CheckForm() {
            alert(1);

            var flag = true;
            if (document.getElementById("<%=tbx_Title.ClientID%>").value == "") {
                document.getElementById("<%=LabTitle.ClientID%>").innerHTML = "标题不能为空！";
                flag = false;
    
            }
            if (document.getElementById("<%=tbx_ID.ClientID%>").value == "") {
                document.getElementById("<%=labID.ClientID%>").innerHTML = "ID不能为空！";
                flag = false;
            }
////            if (document.getElementById("<%=tbx_MaxLength.ClientID%>").value == "") {
////                document.getElementById("<%=LabTitle.ClientID%>").innerHTML = "";
////                flag = false;
            ////            }
            return flag;

        }

    </script>

 

 

  <asp:LinkButton ID="btn_SaveandNew" onclick="btn_Save_Click" OnClientClick="return CheckForm()"  runat="server" >保存并新增</asp:LinkButton>