（一）原生JS实现 - 基本类方法类1 var Class = {2 create: function() {3 return function() { 4 this.initialize.apply(this, arguments); }5 }6 };
对象扩展1 var Extend = function(destination, source) {2 for (var PRoperty in source) {3 destination[property] = source[property];4 }5 };
获取DOM元素属性 1 var Attr = function (element, key, value) { 2 if(arguments.length == 2){ 3 if(element.getAttribute){ 4 return element.getAttribute(key) || element[key] || undefined; 5 } 6 } 7 else if(arguments.length == 3){ 8 element.setAttribute(key,value); 9 }10 };