onStateChange: function(aWebProgress, aRequest, aStateFlags, aStatus)
	{
		// begin loading document
		const nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
		if ((aStateFlags & nsIWebProgressListener.STATE_START) && (aStateFlags & nsIWebProgressListener.STATE_IS_NETWORK))
		{
			var browser = null;
			// search for browser
			if (gBrowser.selectedBrowser.contentWindow == aWebProgress.DOMWindow)
			{
				// active browser
				browser = gBrowser.selectedBrowser;
			} else 
			{
				// bruteforce browsers
				for (var i = 0; i < gBrowser.browsers.length; i++)
				{
					if (aWebProgress.DOMWindow == gBrowser.browsers[i].contentWindow)
					{
						browser = gBrowser.browsers[i];
						break;
					}             
				}
			}

			if (browser != null)
			{
				// search browser tab
				for (var i = 0; i < gBrowser.mTabContainer.childNodes.length; i++)
				{	
					if (gBrowser.getBrowserForTab(gBrowser.mTabContainer.childNodes[i]) == browser)
					{
						// founded tab
						var currentTab = gBrowser.mTabContainer.childNodes[i];


						break;
					}
				}
			}
		}
	}