this.ImageButton1.Attributes.Add("href","return checkThisForm();");

Question

怎么没有作用了
各代码段如何下
......
this.ImageButton1.Attributes.Add("href","return checkThisForm();");
.......                                          <INPUT 
                        type=password maxLength=20 size=25 
                        name=txtOldPassword ID=txtOldPassword runat="server">
                                          <BR>
                &nbsp;&nbsp; 新&nbsp;&nbsp;密&nbsp;&nbsp;码：
                                          <INPUT 
                        type=password maxLength=20 size=25 
                        name=txtNewPassword ID=txtNewPassword runat="server">
                                          <BR>
                &nbsp;&nbsp; 确定新密码：
                                         <INPUT 
                        type=password maxLength=20 size=25 name=txtNewPassword1 ID=txtNewPassword1 runat="server">
                                          <P>&nbsp;&nbsp; <asp:ImageButton id="ImageButton1" onclick="ImageButton1_Click" runat="server" ImageUrl="../images/imgbtn_save.gif"></asp:ImageButton>
                     <SCRIPT language=javascript>
function checkThisForm() 
{
    if (len(document.thisForm.txtOldPassword.value) > 20 || 
        len(document.thisForm.txtOldPassword.value) < 1  || 
        !isStr(document.thisForm.txtOldPassword.value)) 
    {
        alert("对不起,密码必须为英文字母、数字或下划线，长度为1~20。");
        document.thisForm.txtOldPassword.focus();

Answer 1

不能这样写的吧，我记意中好像没有href这个事件哦，
你把href改成onclick试试吧！

Answer 2

href是属性，Attributes.Add增加的应该是类似onclick这种事件
结合服务器客户端脚步再看看

Answer 3

this.ImageButton1.Attributes.Add("onclick","return checkThisForm();");
这句话得放到page_load() 里

Answer 4

你的例子改了下，可以用的
html端
<form id="form1" runat="server">
<INPUT id="txtNewPassword1" type="password" maxLength="20" size="25" name="txtNewPassword1"
runat="server" style="Z-INDEX: 101; LEFT: 48px; POSITION: absolute; TOP: 49px">
<INPUT id="txtNewPassword" style="Z-INDEX: 103; LEFT: 46px; POSITION: absolute; TOP: 13px"
type="password" maxLength="20" size="25" name="txtNewPassword" runat="server">
<asp:ImageButton id="ImageButton1" runat="server" ImageUrl="images\save.jpg" style="Z-INDEX: 102; LEFT: 54px; POSITION: absolute; TOP: 90px"></asp:ImageButton>
<SCRIPT language="javascript">
function checkThisForm() 
{
if ( document.all("txtNewPassword").value != document.all("txtNewPassword1").value ) 
{
 alert("对不起,密码不一致！");
}
}
</SCRIPT>
</form>C#端：
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
this.ImageButton1.Attributes.Add( "onclick" , "checkThisForm();" );
}

Answer 5

修改2处:
[1]this.ImageButton1.Attributes.Add("onclick","return checkThisForm();");
放到page_load() 里
[2]checkThisForm不通过的一定要return false.

Answer 6

还是只执行onclick="ImageButton1_Click"服务端事件，javascript根本没有检查代码
<script language="C#" runat="server">
void Page_Load(object sender, System.EventArgs e)
{    this.ImageButton1.Attributes.Add("onclick","return checkThisForm();");
}void ImageButton1_Click(object sender, ImageClickEventArgs e) {
。。
                                  <TBODY>
                                    <TR>
                                      <TD width="100%">&nbsp;&nbsp; 旧&nbsp;&nbsp;密&nbsp;&nbsp;码：
        
                                          <INPUT 
                        type=password maxLength=20 size=25 
                        name=txtOldPassword ID=txtOldPassword runat="server">
                                          <BR>
                &nbsp;&nbsp; 新&nbsp;&nbsp;密&nbsp;&nbsp;码：
                                          <INPUT 
                        type=password maxLength=20 size=25 
                        name=txtNewPassword ID=txtNewPassword runat="server">
                                          <BR>
                &nbsp;&nbsp; 确定新密码：
                                         <INPUT 
                        type=password maxLength=20 size=25 name=txtNewPassword1 ID=txtNewPassword1 runat="server">
                                          <P>&nbsp;&nbsp; <asp:ImageButton id="ImageButton1" onclick="ImageButton1_Click" runat="server" ImageUrl="../images/imgbtn_save.gif"></asp:ImageButton>
                                          <IMG 
                        style="CURSOR: hand" 
                        onclick="javascript:document.location.href='/person/Per_ManagementCenter.aspx'" 
                        src="../images/imgbtn_return.gif"> 
                                          <asp:Label ForeColor="#FF0000" ID="MSG" runat="server" />                                                                                    </P>
                                          <FONT 
                        color=#ff6600>注：不能使用空格，至少六个字符，不区分大小写。</FONT></TD>
                                    </TR>
                                  </TBODY>

                      <SCRIPT language=javascript>
function checkThisForm() 
{
    if (len(document.thisForm.txtOldPassword.value) > 20 || 
        len(document.thisForm.txtOldPassword.value) < 1  || 
        !isStr(document.thisForm.txtOldPassword.value)) 
    {
        alert("对不起,密码必须为英文字母、数字或下划线，长度为1~20。");
        document.thisForm.txtOldPassword.focus();
        return false;
    }
..................