Sets a URL to a custom image which replaces a default wait indicator.
var u = $au.uploader({
//...other params...
});
var ip = $au.installationProgress(u);
ip.progressImageUrl("Scripts/InstallationProgress.gif");
//...other params...
u.writeHtml();
Type: String
The URL to a custom image which replaces a default wait indicator.
Default value is "Scripts/InstallationProgress.gif".