解决已解密的登录请求方法

<tr>
            <td height="35" align="center" valign="middle"><strong>密&nbsp;&nbsp;码：</strong></td>
            <td align="left" valign="middle"><input type="text" name="pwd" class="input1"  onkeypress="javascript:hiddenPass(event)" onkeyup="this.value=this.value.replace(/./g,'*');">
   <input type="hidden" name="password" id="password"></td>
          </tr>
 
JS：
function hiddenPass(e){
 
 e= e?e:window.event;
 var kcode=e.which?e.which:e.keyCode;
 var pass=document.getElementById("pwd");
 var j_pass=document.getElementById("password");
 if(kcode!=8 && kcode != 13){
  var keychar=String.fromCharCode(kcode);
  j_pass.value=j_pass.value+keychar;
  j_pass.value=j_pass.value.substring(0,pass.length);
 }
}