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2. Ëüʵ¼ÊÖ¸functionËù¹ØÁªµÄ¶ÔÏó£¬Èç¹ûfunctionûÓйØÁªÈκζÔÏó£¬ÔòthisÊÇGlobal¶ÔÏó
var msg = 'I am global';
function showMsg(){
alert(this.msg);
};
function nestedShowMsg (){
var nested = function(){
alert(this.msg);
};
nested();
};
var owner = {msg:'I am local'};
owner.showMsg = showMsg;
owner.nestedShowMsg = nestedShowMsg;
showMsg(); //should be 'I am global'
owner.showMsg(); //should be 'I am local'
owner.nestedShowMsg();should be 'I am global'
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