Sidebar Gadget Context

I’m writing a sidebar gadget, and using a standard browser window for most of my debugging. But of course the System object is not defined in this context, and I don’t want to constantly get error messages for this.

This function will check whether the script is running in the context of the sidebar, or in a regular browser:

// Check whether we're in a gadget 
// Returns false if loading in a regular browser.
function inGadgetContext() {
    return (typeof(window["System"]) == "undefined") ? false : true;
}