var b = new AssetPickerConfig("");
b.ClientID = "";
b.DefaultAssetLocation = "";
b.DefaultAssetImageLocation = "";
b.CurrentWebBaseUrl = "";
b.AllowExternalUrls = "";
b.ManageHyperlink = false;
b.AssetUrlClientID = "";
b.ReturnCallback = function(f, e, d, b) {
alert();
};
var h = new ImageAsset("");
h.LaunchModalAssetPicker(b)