I have a simple form where a user can upload multiple images. I only want the user to upload 4 images at once, so I did the following:

```js
$("#myfile").on("change", function() {
    if ($("#myfile")[0].files.length > 4) {
        alert("You can select only 4 images");
    } 
});
```

```html
<input type="file" id="myfile" class="form-control" name="pimage[]" multiple="multiple">
```

This gives an alert when the user uploads more than 4 images but doesn't stop them from submitting the form.

Can anyone please tell me how to clear the user uploaded images if the limit exceeds or disable the submit button?