on webpage enter, display html browse file dialogue?

Question

I have the following code giving a manual browse file dialogue:

input type="file" name="image_file" id="image_file" onchange="fileSelectHandler()"

Is there a way to call this (perhaps using javascript?) automatically on page enter so that the user is given the browse file dialogue upon entering the webpage?

Thanks!

Answer 1

<input type="file" name="image_file" id="image_file" onchange="fileSelectHandler()" style="visibility:hidden" />

and the jquery code:

<script>
$(document).ready(function(){
$("input[type='file']").trigger('click');
});
</script>

This requires permissions from user to allow pop ups for security reasons... Jquery trigger file input http://www.acunetix.com/websitesecurity/upload-forms-threat/