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1.Navigator¶ÔÏó
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04  <!-- ------------------------------ -->
05  <HTML>
06  <HEAD>
07  <TITLE>Navagator¶ÔÏó</TITLE>
08  </HEAD>
09  <BODY>
10  <script language="javascript">
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Ô­ÎĵØÖ·:http://netboy.cnblogs.com/archive/2006/02/18/333260.html
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using System;  
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var status = flight.status || "unknown";
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flight.equipment.model //throw "TypeError"
flight.equipment && flight.equipment.model //undefined

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var a={},b={},c={};
document.writeln(a===b); //false
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