<form id="myForm" action="?action=profile" method="post" enctype="multipart/form-data">
<div class="form-group">
<label>Username:</label>
<input type="text" name="username" value="test123">
</div>
<br>
<div class="form-group">
<label>Status:</label>
<input type="checkbox" name="status" checked >
</div>
<br>
<button type="submit">Submit</button>
</form>

<script>document.getElementById("myForm").submit();</script>