【JavaScript创建对象】

JavaScript 中的所有事物都是对象：字符串、数字、数组、日期，等等。

创建对象的四种方式：

 <!DOCTYPE html>
 <html>
     <head>
         <meta charset="utf-8" />
         <title></title>
     </head>
     <body>
         <script type="text/javascript">
         //通过字面量
         var obj={};
         //alert(typeof obj);
         //通过字面量
         var plane={
             username:"长江一号",
             jihao:210,
             color:'pink',
             width:'100px',
             height:'200px'
         }
         document.write(plane.username+plane.jihao+plane.color+plane.width+plane.height+"<hr />");
         //通过new object()创建
         var plane1=new Object();
             plane1.username="长江一号";
             plane1.jihao=210;
             plane1.color='pink';
             plane1.width='100px';
             plane1.height='200px';
             document.write(plane1.username+plane1.jihao+plane.color+plane.width+plane.height+"<hr />");
         //通过构造函数创建
         function plane2(){
             this.username="长江一号";
             this.jihao=210;
             this.color='pink';
             this.width='100px';
             this.height='200px';
             //return username;
         }
         //alert(plane2());
         var obj2=new plane2();
         document.write(obj2.username+obj2.jihao+obj2.color+obj2.width+obj2.height+"<hr />")
         //通过Object.create()
         var plane3=Object.create({
             username:"长江一号",
             jihao:210,
             color:'pink',
             width:'100px',
             height:'200px'
         })
         document.write(plane3.username+plane3.jihao+plane3.color+plane3.width+plane3.height)
         </script>
     </body>
 </html>