how to enable file input on click on image

<input type="file" id="imgupload" style="display:none"/> 
<button id="OpenImgUpload">Image Upload</button>

$('#OpenImgUpload').click(function(){ $('#imgupload').trigger('click'); });

<input type="file" id="imgupload">
<a href="#" onclick="$('#imgupload').trigger('click'); return false;">Upload file</a>