FileToBase64Convert.js

function preview_image(imgOutputId, textOutputId, event) {
    var reader = new FileReader();
    reader.onload = function () {
        var imgOutput = document.getElementById(imgOutputId);
        var textOutput = document.getElementById(textOutputId);
        imgOutput.src = reader.result;
        textOutput.value = imgOutput.src;
    }
    reader.readAsDataURL(event.target.files[0]);
}