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1.HTMLÎĵµÊ÷Ðαíʾ
2.Node[] Node.childNodes 
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function person(name,age)
{
this.name=name;

this.age=age;
}
function man(name,age)
{
this.sex="ÄÐ";
this.base=person;
this.base(name,age);
}
function woman(name,age)
{
this.sex="Å®";
this.base=person;
this.base(name,age)
} ......
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