I have the window:
Code:
win = desktop.createWindow({            	
		.....Config Options.... 
	, app: this.app
	, phpFile: this.phpFile
	, moduleId: this.moduleId	              
	, listeners:{
		activate: function (w) {			
			w.body.getUpdater().update({
				url: w.app.connection
				, params: {
					task: "getBalance"			
					, moduleId: w.moduleId
					, fileName: w.phpFile
				}
				, method: 'POST'
				, scripts: false
				, discardUrl: true
				, scope: w
				, nocache: true					        
			});						
		}		
	}
});
Activate listener works correctly.

After window definition I tried to use this code to start auto refresh window.body content.
Code:
win.show();
win.body.getUpdater().startAutoRefresh(2);
Also i tried this code:
Code:
win.body.getUpdater().startAutoRefresh({
	interval: 2
	, url: app.connection
	, params: {
		task: "getBalance"
		, moduleId: moduleId
		, fileName: phpFile
	}	
	, refreshNow: false
});
FireBug shows me the error:
Code:
cfg has no properties
[Break on this error] url = cfg.url;
How to start auto update window's body element with sending POST params?
I've read docs, and found that if I didn't specify new url method should use the last used url.