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var obj = new Object();
var objRef = obj; //objÓëobjRefÖ¸Ïòͬһ¸ö¶ÔÏó,objRefÊÇÒ»¸öÒýÓÃ

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var items = new Array("one","two","three");
var itemsRef = items; //´´½¨Ò»¸öÒýÓÃ
items.push("four");
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var items = new Array("one","two","three");
var itemsRef = items;
items = new Array("new"); //´ËʱitemsÓëitemsRefÖ¸Ïò²»Í¬¶ÔÏó

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var item = "test";
var itemRef = item;
item += "ing";
alert(item != itemRef); //´ËʱitemÓëitemRefÖ¸Ïò²»Í¬¶ÔÏó


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calendar = new Date();
day = calendar.getDay();
month = calendar.getMonth();
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