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HTML

<a href="#" id="upload_widget_opener">Upload multiple images</a>

<!--Step 1: Replace the script URL-->
<!--<script src="https://widget.cloudinary.com/global/all.js" type="text/javascript"></script>  -->
<script src="https://widget.cloudinary.com/v2.0/global/all.js" type="text/javascript"></script>

<script type="text/javascript">
    //Step 2.1:  Declare your uploadwidget variable
    var myUploadWidget;
    document.getElementById("upload_widget_opener").addEventListener("click", function() {
        myUploadWidget = cloudinary.openUploadWidget({
                cloudName: "aditimadan",
                uploadPreset: "unsigned",
                //Step 3:  Add list of sources that should be added as tabs in the widget.
                sources: [
                    "local",
                    "url",
                    "camera"
                ],
                //UI Customization
                styles: {
                    palette: {
                        window: "#10173a",
                        sourceBg: "#20304b",
                        windowBorder: "#9999ff",
                        tabIcon: "#33ffcc",
                        inactiveTabIcon: "#0e2f5a",
                        menuIcons: "#ffccff",
                        link: "#ff0066",
                        action: "#33ffcc",
                        inProgress: "#00ffcc",
                        complete: "#33ff00",
                        error: "#cc3333",
                        textDark: "#000000",
                        textLight: "#ffffff"
                    }
                },
                fonts: {
                    default: null,
                    "'Cute Font', cursive": "https://fonts.googleapis.com/css?family=Cute+Font",
                    "'Gamja Flower', cursive": "https://fonts.googleapis.com/css?family=Gamja+Flower|PT+Serif"
                }
            },
            function(error, result) {

                //Step 2.3:  Listen to 'success' event
                if...