ImageFileReader.js~

var imgFile = document.getElementById('submitfile');
if (imgFile.files && imgFile.files[0]) {
    var width;
    var height;
    var fileSize;
    var reader = new FileReader();
    reader.onload = function(event) {
        var dataUri = event.target.result,
        img = document.createElement("img");
        img.src = dataUri;
        width = img.width;
        height = img.height;
        fileSize = imgFile.files[0].size;
        alert(width);
        alert(height);
        alert(fileSize);
   };
   reader.onerror = function(event) {
       console.error("File could not be read! Code " + event.target.error.code);
   };
   reader.readAsDataURL(imgFile.files[0]);
}