注册表单验证

<script type="text/javascript" language="javascript">
//工号
function checkGongHao()
{
    var txtGongHao = document.getElementById("<%=txtGongHao.ClientID %>").value;
    if(txtGongHao.length == 0 || txtGongHao == "")
    {
        document.getElementById("gonghao").innerHTML="<font style='color:red;font-size:12px;'>请输入您的工号!</font>";
        document.getElementById("gonghao").style.background="url(../images/error.gif) #fff2e9 no-repeat 0px 2px";
        return false;
    }
    document.getElementById("gonghao").innerHTML="<font style='color:red;font-size:12px;'>输入正确!</font>";
    document.getElementById("gonghao").style.background="url(../images/right.gif) #e9ffeb no-repeat 0px 2px";
    return true;
}
//姓名
function checkName()
{
    var txtName = document.getElementById("<%=txtName.ClientID %>").value;
    if(txtName.length == 0 || txtName == "")
    {
        document.getElementById("name").innerHTML="<font style='color:red;font-size:12px;'>请输入您的姓名!</font>";
        document.getElementById("name").style.background="url(../images/error.gif) #fff2e9 no-repeat 0px 2px";
        return false;
    }
    document.getElementById("name").innerHTML="<font style='color:red;font-size:12px;'>输入正确!</font>";
    document.getElementById("name").style.background="url(../images/right.gif) #e9ffeb no-repeat 0px 2px";
    return true;
}
//密码
function checkPwd()
{
    var txtPwd = document.getElementById("<%=txtPwd.ClientID %>").value;
    if(txtPwd.length == 0 || txtPwd == "")
    {
        document.getElementById("pwd").innerHTML="<font style='color:red;font-size:12px;'>请输入您的密码!</font>";
        document.getElementById("pwd").style.background="url(../images/error.gif) #fff2e9 no-repeat 0px 2px";
        return false;
    }
    document.getElementById("pwd").innerHTML="<font style='color:red;font-size:12px;'>输入正确!</font>";
    document.getElementById("pwd").style.background="url(../images/right.gif) #e9ffeb no-repeat 0px 2px";
    return true;
}
//密码2
function checkPwd2()
{
    var txtPwd = document.getElementById("<%=txtPwd.ClientID %>").value;
    var txtPwd2 = document.getElementById("<%=txtPwd2.ClientID %>").value;
    if(txtPwd.length == 0)
    {
        return false;
    }
    if(txtPwd != txtPwd2 || txtPwd2.length == 0)
    {
        document.getElementById("pwd2").innerHTML="<font style='color:red;font-size:12px;'>输入密码不一致!</font>";
        document.getElementById("pwd2").style.background="url(../images/error.gif) #fff2e9 no-repeat 0px 2px";
        return false;
    }
    document.getElementById("pwd2").innerHTML="<font style='color:red;font-size:12px;'>输入正确!</font>";
    document.getElementById("pwd2").style.background="url(../images/right.gif) #e9ffeb no-repeat 0px 2px";
    return true;
}
function checkAddUser()
{
    if(checkGongHao() && checkName() && checkPwd() && checkPwd2())
    {
        return true;
    }
    return false;
}

<table class="zuce_table">
  <tr>
    <td class="tdLeft">工号：</td>
    <td class="tdRight"><asp:TextBox ID="txtGongHao" onblur="checkGongHao()" runat="server"></asp:TextBox></td>
    <td><div id="gonghao" style="170px; text-indent:25px; padding:5px 0px;"></div></td>
  </tr>
  <tr>
    <td class="tdLeft">姓名：</td>
    <td class="tdRight"><asp:TextBox ID="txtName" runat="server" onblur="checkName()"></asp:TextBox></td>
    <td><div id="name" style="170px; text-indent:25px; padding:5px 0px;"></div></td>
  </tr>
  <tr>
    <td class="tdLeft">密码：</td>
    <td class="tdRight"><asp:TextBox ID="txtPwd" runat="server" onblur="checkPwd()" TextMode="Password"></asp:TextBox></td>
    <td><div id="pwd" style="170px; text-indent:25px; padding:5px 0px;"></div></td>
  </tr>
  <tr>
    <td class="tdLeft">确认密码：</td>
    <td class="tdRight"><asp:TextBox ID="txtPwd2" runat="server" onblur="checkPwd2()" TextMode="Password"></asp:TextBox></td>
    <td><div id="pwd2" style="170px; text-indent:25px; padding:5px 0px;"></div></td>
  </tr>
  <tr>
    <td class="tdLeft">角色：</td>
    <td class="tdRight">
        <asp:DropDownList ID="ddlRole" runat="server" Width="154">
            <asp:ListItem>用户</asp:ListItem>
            <asp:ListItem>管理员</asp:ListItem>
        </asp:DropDownList>
    </td>
    <td><div id="Div4"></div></td>
  </tr>
  <tr>
    <td colspan="3" align="center">
        <asp:ImageButton ID="imbBtnAdd" runat="server" ImageUrl="~/images/bt_zuce.gif" OnClientClick="return checkAddUser()" onclick="imbBtnAdd_Click" />
    </td>
    </tr>
</table>