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Number.add(num)£º×÷Óã¬Êý×ÖÏà¼Ó
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//¶¨ÒåÒ»ÏÂÈË
var people = function(){
this.name = 'yuxing';
};
people.prototype.sex = 'boy';
people.prototype.say = function(){
alert('i am say!');
};

var p = new people();
alert(p.name);
alert(p.sex);
p.say(); 
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//¶¨ÒåÒ»ÏÂÈË
var people = function(){
this.name = 'yuxing';
};
people.prototype = {
sex : 'boy',
say : function(){
alert('i am say!');
}
};

var p = new people();
alert(p.name);
alert(p.sex);
p.say(); 
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http://bokee.shinylife.net/blog/article.asp?id=455
http://tech.ddvip.com/2009-05/1243588303121461.html


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