确认密码验证[关闭]

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                    <p class="mb0 mt6">Closed <span title="2014-09-13 04:54:48Z" class="relativetime">5 years ago</span>.</p>
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I have an html file and I am trying to check two password field ( Password & conform Password), I have to use this particular form I can't use any sample, I have looked at examples here and I came a cross a working example and I tried to get it work but it's not working so far, i am new to this so please be patient with me on this

<div id="register" class="animate form">
 <form action="mysuperscript.php" autocomplete="on"> 
 <h1> Sign up </h1> 
 <p> 
 <label for="usernamesignup" class="uname" data-icon="u">Your username</label>
 <input id="usernamesignup" class="username" name="usernamesignup" required="required" type="text" placeholder="mysuperusername690">
 <span class="check"  ></span> 
 </p>
 <p> 
 <label for="emailsignup" class="youmail" data-icon="e"> Your email</label>
 <input id="emailsignup" name="emailsignup" required="required" type="email" placeholder="[e-mail]"> 
 </p>
 <p> 
 <label for="passwordsignup" class="youpasswd" data-icon="p">Your password </label>
 <input id="passwordsignup" name="passwordsignup" required="required" type="password" placeholder="eg. X8df!90EO">
 </p>
 <p> 
 <label for="passwordsignup_confirm" class="youpasswd" data-icon="p">Please confirm your password </label>
  <input id="passwordsignup_confirm" name="passwordsignup_confirm" required="required" type="password" onkeyup="checkPasswordMatch(); placeholder="eg. X8df!90EO">
  </p>
  <p class="signin button"> 
  <input type="submit" value="Sign up"> 
  </p>
  <p class="change_link">  
Already a member ?
  <a href="#tologin" class="to_register"> Go and log in </a>
</p>
</form>

I have added this function to the code

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<script type="text/javascript">
function checkPasswordMatch() {
    var password = $("#passwordsignup").val();
    var confirmPassword = $("#passwordsignup_confirm").val();

    if (password != confirmPassword)
        $("#register").html("Passwords do not match!");
    else
        $("#register").html("Passwords match.");
}
</script>

according to the example it should work but obviously I am doing something wrong here, appreciate your help.

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Answer 1

This line is messed up.

 onkeyup="checkPasswordMatch(); placeholder="eg. X8df!90EO">

Your double quotes are not matched.