password validation

 <form method="post" action="new_pass_code.php" role="login">

          <img src="assets/img/imgpsh_fullsize.png" class="img-responsive" alt="" style="width:90%;"/>
 Enter New Password
           <input type="password" id="txtPassword" name="newpass" required/>
          Confirm New Password
          <input type="password" id="txtConfirmPassword" required/>
         
 <input type="submit" id="btnSubmit" value="Submit" onclick="return Validate()" />

          <div>

          </div>
         
        </form>

<script type="text/javascript">
    function Validate() {
        var password = document.getElementById("txtPassword").value;
        var confirmPassword = document.getElementById("txtConfirmPassword").value;
        if (password != confirmPassword) {
            alert("Passwords do not match.");
            return false;
        }
        return true;
    }
</script>