This can be used for buttons 

<form onsubmit="myFunction()">

  Enter name: <input type="text">

  <input type="submit">

</form>

​

<script>

function myFunction() {

  alert("The form was submitted");

}

</script>

<form onsubmit="return validateForm(event)">

  <input type="text" name="username" placeholder="Username" required>

  <input type="password" name="password" placeholder="Password" required>

  <input type="submit" value="Submit">

</form>

​

<script>

function validateForm(event) {

  // Perform form validations or additional actions here

  if (/* some validation condition fails */) {

    event.preventDefault();  // Prevents form submission if validation fails

    // Display error message or take necessary actions

  } else {

    // Form is valid, continue submitting

  }

}

</script>

<form id="schedule_a_call_form" method="post" action="#" onsubmit="add_schedule_a_call();return false">

</form>

​

function add_schedule_a_call() {

    // $('.loadingk').show();

    var formData = new FormData(document.getElementById("schedule_a_call_form"));

    formData.append('number', phone);

      $.ajax({

        url: "../controller/home/php/schedule_a_call.php?type=100",

        type: "POST",

        data:  formData,

        contentType: false,

        processData:false,

        cache: false,

        success: function(dataResult){

            console.log(dataResult);

             var dataResult = JSON.parse(dataResult);

            if(dataResult.statusCode==200){

                $('#schedule_a_call_form').trigger("reset");

                $.notify(

                dataResult.msg, { position:"top right", className: 'success' }

                );

                $('#msgorerror').html('<div class="message-box success" ><p>'+dataResult.msg+'</p></div>');

​

            }else if(dataResult.statusCode==201){

                $.notify(

                dataResult.msg, { position:"top right", className: 'error' }

                );

                $('#msgorerror').html('<div class="message-box error" ><p>'+dataResult.msg+'</p></div>');

​

            }

        }

    });

    }