var Class = {
create: function() {
return function() {
this.initialize.apply(this, arguments);
}
}
};
Object.extend = function(destination, source) {
for (var property in source) destination[property] = source[property];
return destination;
};
Function.prototype.bind = function(object) {
var __method = this;
return function() {
//使用object对象替换__method中的this并且调用__method方法
return __method.apply(object, arguments);
}
};
//forEach方法：将this改为bind对象，并以参数this[i],i调用fn方法，this[i]是当前数组元素，i是当前索引
if (!Array.prototype.forEach){
Array.prototype.forEach = function(fn, bind){
for(var i = 0; i < this.length ; i++) fn.call(bind, this[i], i);
};
}
//each方法同forEach
Array.prototype.each = Array.prototype.forEach;
//返回字符串的骆驼写法.e.g. "font-color".camelize() -> fontColor,处理css属性时需要
String.prototype.camelize = function(){
return this.replace(/-D/gi, function(match){
return match.charAt(match.length - 1).toUpperCase();
});
};
var $A = function(iterable) {
var nArray = [];
for (var i = 0; i < iterable.length; i++) nArray.push(iterable[i]);
return nArray;
};
/*
* 如果传入的参数为一个则返回一个element，否者返回一个数组
* */
function $() {
if (arguments.length == 1) return get$(arguments[0]);
var elements = [];
$c(arguments).each(function(el){
elements.push(get$(el));
});
return elements;
function get$(el){
if (typeof el == 'string') el = document.getElementById(el);
return el;
}
};
if (!window.Element) var Element = {};
Object.extend(Element, {
remove: function(element) {//删除指定的元素
element = $(element);
element.parentNode.removeChild(element);
},
hasClassName: function(element, className) {//判断指定的元素是否有相应的css class
element = $(element);
return !!element.className.match(new RegExp(""+className+""));
},
addClassName: function(element, className) {//给相应的元素加上指定的css
element = $(element);
if (!Element.hasClassName(element, className)) element.className = (element.className+' '+className);
},
removeClassName: function(element, className) {//给相应的元素删除指定的css
element = $(element);
if (Element.hasClassName(element, className)) element.className = element.className.replace(className, '');
}
});
//返回具有相同css class的元素
document.getElementsByClassName = function(className){
var elements = [];
var all = document.getElementsByTagName('*');
$A(all).each(function(el){
if (Element.hasClassName(el, className)) elements.push(el);
});
return elements;
};
转自：http://www.cnblogs.com/qixuejia/