function callKB(){
		w = screen.width-100;
		h = screen.height-150;
		x = (screen.width-w)/2;
		y = 20;
		window.open('/spediscisubito/assistenza-corriere-espresso','assistenza_corriere_espresso','Scrollbars=yes,Resizable=yes,Width='+w+',Height='+h+',Status=Si,Location=Si,Toolbar=Si,Left='+x+',Top='+y+'');
	}