javascript类的创建的多种方式
基本方法很简单，但在javascript中创建类有多种方式。
看例子代码，主要是类方法的写法不一样。
1.?function people(name){
???????? ?this.name=name;
??????????this.printInfo=function(){document.write(this.name);};
??}
??
2.?
? ?var people=function(name){
???this.name=name;
???this.printInfo=function(){document.write(this.name)}
??}
?
3.
??var people=function(name){
???this.name=name;
???this.printInfo=printInfo;
??}
??
??function printInfo(){document.write(this.name)}
?
4.??var people=function(name){
???this.name=name;
??}
??
??people.prototype.printInfo=function(){document.write(this.name)}
?
5.??var people=function(name){
???this.name=name;
??}
??
??people.prototype={
???printInfo:function(){document.write(this.name)}
??}
?
?
