Hide the form and display an image after form submit
<!-- START code for displaying an image instead of the form after submission -->
<style>
#element-188{
display: none; /*hide the image by default*/
}
</style>
<script>
window.instapageFormSubmitSuccess = function( form ){ /*form submit event*/
$('#element-186').css('display', 'none'); /*hide the form*/
$('#element-188').css('display', 'block'); /*show the image*/
};
</script>
<!-- END code for displaying an image instead of the form after submission -->