Code for TinyMCE:

tinymce.init({
    file_picker_callback: function (callback, value, meta) {
        myImagePicker(callback, value, meta);
    }
});
function myImagePicker(callback, value, meta) {
    tinymce.activeEditor.windowManager.open({
        title: 'Image Browser',
        url: '/media/browser/1?type=' + meta.filetype,
        width: 800,
        height: 550,
    },
        {
            oninsert: function (url, objVals) {
                callback(url, objVals);
            }
        });
};