<tr>
                <td height="39" colspan="2" align="center" background="images/login_r4_c1.gif"><input type="image" src="images/button-denglu2.gif" width="75" height="27" onclick="login()" style="cursor:hand" name="imgbtn"></td>
                <td><img src="images/spacer.gif" width="1" height="39" border="0" alt="" name="imgbtn"></td>
       </tr>

解决方案 »

  1.   

    就是用这个<input type="image" src.....>
    详情:http://www.8esky.com/handbook/dhtml/objects/INPUT_image.html
      

  2.   

    <html>
    <body>
    <form name="form1" method="post" action="#">
    <table>
    <tr> 
              <td width="139"> 工号: 
                </td>
                <td width="140"><input name="STAFFNBR" type="text" id="STAFFNBR" size="15" onKeyDown="keydown1()" onmouseover="this.select()">
                </td>
            </tr>
            <tr> 
              <td width="139"> 密码: 
                </td>
                <td width="140"><input name="pwd" type="password" id="pwd" size="15" onKeyDown="keydown2()"></td>
            </tr>
            <tr align="center"> 
              <td colspan="2"><img src="tj.gif"  onClick="check_form()">
              &nbsp;
      <img src="qx.gif"  onClick="form.reset()">
              </td>
            </tr>
    </table>
    </form>
    </body>
    </html>
    <SCRIPT LANGUAGE="JavaScript">
    function check_form(){
    if(form1.STAFFNBR.value==null){
    alert("请输入登录工号");
    }else if(form1.pwd.value==null){
    alert("请输入密码");
    }else{
    form1.submit();
    }
    }
    </SCRIPT><SCRIPT LANGUAGE="JavaScript">
    <!--
    document.form1.STAFFNBR.focus();
    function keydown1()
    {
      if (event.keyCode==13)
        form1.pwd.focus();
    }
    function keydown2()
    {
      if (event.keyCode==13)
        check_form();
    }
    -->
    </SCRIPT>
      

  3.   

    onkeypress="if(window.event.keyCode==13)
      

  4.   

    如果是在一个form中,不要使用<img>标记,你使用<input>标记,将type="image"就可以了