var ZixoProgressListener = {
    QueryInterface: function (aIID)
    {
        if (aIID. equals (Components. interfaces. nsIWebProgressListener) ||
            aIID. equals (Components. interfaces. nsISupportsWeakReference) ||
            aIID. equals (Components. interfaces. nsIXULBrowserWindow) ||
            aIID. equals (Components. interfaces. nsISupports))
            return this;
        throw Components. results. NS_NOINTERFACE;
    },
    
	onLocationChange: function (a, b, newLocation) {
		// do something
	},
	
	onProgressChange: function(a,b,c,d,e,f) {
		
	},
	
	onSecurityChange: function(a,b,c) {
		
	},
	
	onStateChange: function(webProgress, b, stateFlags,d) {
		var STOP = (stateFlags & STATE_STOP) != 0;
		var NETWORK = (stateFlags & STATE_NETWORK) != 0;
		
		if (STOP && NETWORK) {
			// document is loaded
		}
	},
	
	onStatusChange: function(a,b,c,d) {
		
	}
};