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var o=new Object();
o.name="hello";
alert(o.name); //Êä³ö“hello”
delete o.name£»
alert(o.name); //Êä³ö“undefined” .
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start:var iConunt = 10;
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function doAdd(){
if(argument.lenght==1){
alert(argument[0]+10);
}else if(argument.lenght==2){
alert(argument[0]+argument[1])
}
}
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doAdd(10); //Êä³ö£º 20
doAdd(30,20); //Êä³ö£º 50
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