Preview the image from an input file

script.js

// Call this function on the onchange event of the input
function prevVisu(input) {
  if (input.files && input.files[0]) {
    var reader = new FileReader();
    reader.onload = function(e){
      $("div#visuForm").html("<img class='img-polaroid' src='" + e.target.result + "' alt='Preview du visuel'>");
    };
    reader.readAsDataURL(input.files[0]);
  }
}