標籤：object var bsp can round org function charset efi
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><script type=text/javascript charset=utf-8>var x = "x";var y = "yyy";function F(a){ this.n = ‘fsfsf‘; this.sc = 4; var i = new init(this);//F()，this指的是window i.ii = "ii";}function init(o){ alert(o);//[object Window] alert(sc);//4 alert(o.x);//x alert(o.y);//yyy this.n = o.sc; //init方法不是對象調用的時候，new的時候this指的是本類的對象，不是window對象 this.name = "namename"; this.o = o; that = this; return function(){ alert("333" + this.n);//undefined,this是這個匿名函數的對象 alert("333" + that.n); this.h = that; this.k = that.n; this.a = that.a } ;}alert(1);var d = F(3);alert(window.n)//fsfsfalert(2);var dd = new d();alert(window.name)//空alert(3);alert(dd.k);//4alert(dd.h.name);//namename alert(dd.a.n);//fsfsf alert(window.k);//undefinedalert(window.h.name);//Cannot read property ‘name‘ of undefined alert(window.a.n);//Cannot read property ‘n‘ of undefined function F(a){ this.n = 1; this.sc = 4; return new init(this);//this是F對象}function init(a){ alert("111" + a.sc);//4 this.n = a.sc; return { k : this.n }}alert(1);var d = F(3);alert(d.k); //4function F(a){ this.n = 1; this.sc = "scscsc";}var d = new F();alert(window.sc);//undefined</script></head><body></body></html>
jquery--this
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