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function f(x,y,z)
{
    //Ê×Ïȼì²é´«µÝµÄ²ÎÊýÊýÁ¿ÊÇ·ñÕýÈ·
    if(arguments.length != 3)
    {
        throw new Error("function f called with " + arguments.length + "arguments ,but it not 3 arguments.");
    }
    //ÏÂÃæÔËÐÐÕæÕýµÄº¯Êý
}
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function max()
{
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    var m = Number.NEGATIVE_INFINITY;
    for(var i = 0; i < arguments.length; i++)
    {
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            m = arguments[i];
    }
    return m;
}
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var ob = function(){
var obj = this;
function fn1(){
alert( obj === window );//false
alert( this === window );//ture
}
this.fn2 = function() {
fn1();
}

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function test(){
var m=n=1;
alert(m);
}
alert(n);
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function test(){
var m=n=1;
alert(m);
}
test();
alert(n);
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
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