chose imgae file image preview code example
Example: how to display image before upload in jhtml
function display(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(event) {
$('#myid').attr('src', event.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
$("#demo").change(function() {
display(this);
});