<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body> <script> function Rect(w,h){ this.width=w; this.height=h; this.area=function(){ return this.width*this.height; } } var r= new Rect(4,8); alert("长"+r.width+"高"+r.height+",面积:"+r.area()); </script> </body> </html>
运行之后的效果如下：