string添加属性

给string对象添加属性

方法一：

var myObj = function(){     this.study = "JavaScript"; } myObj.prototype.hobby = function() {     this.hobby = "See girl"; } var newObj = new myObj(); for ( var attr in newObj ) {     document.write( attr +"<br/>" ); }   

方式二

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var superObj = { name:"xugang" }; var subObj = { age:20 }; function extend(superObj,subObj){ //获得父对象的原型对象     subObj.getSuper = superObj.prototype; //将父对象的属性给子对象     for(var i in superObj){         subObj[i] = superObj[i];     } } extend(superObj,subObj); for ( var s in subObj ) {     document.write( s +"<br/>" ); //遍历子对象的属性 } //-->