类对象的方法with和in
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> <title>无标题文档</title> </head> <body> <script type="text/javascript" > function Student(name,age) { this.name=name; this.age=age; } var xiaozhi=new Student("xiaozhi",21); with(xiaozhi) { alert(name+"...."+age); } for( s in xiaozhi)//s是属性名 name xiaozhi age 21 { ///alert(s+"........"+xiaozhi[s]); } var a=[1,6,2,5,9]; for(x in a) //01234{ // alert(x+"............."+a[x]); } </script> </body> </html>