JavaScript功能在jsp页面上不起作用

Question

我一直在尝试验证输入的2个密码，但是即使我输入了错误的密码，JavaScript函数也不会执行

userregistration.jsp

function matchpass() {

  var firstpassword = document.myform.psw.value;
  var secondpassword = document.myform.psw - repeat.value;

  if (firstpassword == secondpassword) {
    return true;
  } else {
    alert("password must be same!");
    return false;
  }
}

<form name="myform" action="RegisterControllerServlet" method="post">

  <br><br>
  <label for="psw"><b>Password</b></label>
  <input type="password" placeholder="Enter Password" name="psw" required>

  <label for="psw-repeat"><b>Repeat Password</b></label>
  <input type="password" placeholder="Repeat Password" name="psw-repeat" required>
  <hr>


  <button type="submit" class="registerbtn" onSubmit="return matchpass();">Register</button>
  </div>

我希望能够验证两个密码

Answer 1

删除#include "Message.h"并将return更改为onSubmit

onclick

Answer 2

function matchpass() {
  
  var firstpassword = document.myform.psw.value;
  var secondpassword = document.myform.psw_repeat.value;

  if (firstpassword == secondpassword) {
    document.myform.submit();
  } else {
    alert("password must be same!");    
  }
}

<form name="myform" action="RegisterControllerServlet" method="post">

  <br><br>
  <label for="psw"><b>Password</b></label>
  <input type="password" placeholder="Enter Password" name="psw" required>

  <label for="psw-repeat"><b>Repeat Password</b></label>
  <input type="password" placeholder="Repeat Password" name="psw_repeat" required>
  <hr>
</form>
 
 <button class="registerbtn" onclick="matchpass();">Register</button>