string添加属性

给string对象添加属性

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/>" );
}

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
}
//-->