Js集合

1.图片轮番结合放大

// JavaScript Document

var $ = function(id){return typeof id == 'string' ? document.getElementById(id) : id;};function Each(a,fn){for(var i=0;i<a.length;i++)fn.call(a[i],i,a)};function on(o,type,fn){o.attachEvent?o.attachEvent('on'+type,function(){return fn.call(o)}):o.addEventListener(type,fn,false);return on;};

var big=$("bigp");
var cont=$("content");
var smallimg=cont.getElementsByTagName("img");
var small_url = cont.getElementsByTagName("img")[0].getAttribute("src");;
(function(){
Each(smallimg,function(i){
 on(smallimg[i],'mouseover',function(){
  Each(smallimg,function(j){
   if(i==j){
    big.src=smallimg[j].src;
    big.alt=smallimg[j].alt;
    small_url = cont.getElementsByTagName("img")[j].getAttribute("src");
    smallimg[j].className="lion";
   }else{
    smallimg[j].className="";
   }
  });
 });
});
})();

var smalmg = $("fangdj");//Obj
var showimg = $("showimg");//滤镜图片
var bigimg = $("bigimg");//右大图
var show_half = maxWidth = maxHeight = 0;
smalmg.onmouseover = function(){
 showimg.style.display = "block";
 bigimg.style.display = "inline";
 show_half = showimg.offsetHeight/2;
 maxWidth = smalmg.clientWidth - showimg.offsetWidth;
 maxHeight = smalmg.clientHeight - showimg.offsetHeight;
 //上面两个变量指明showimg允许活动的区域
};
smalmg.onmousemove = function(e){
 e = e || window.event;//兼容多个浏览器的event参数模式
 var num=bigimg.clientWidth/showimg.clientWidth;
 var Top = mousePosition(e).y - smalmg.offsetTop - show_half;
 var Left = mousePosition(e).x - smalmg.offsetLeft - show_half;
 //获取当前移动的showimg位置 计算方法是 鼠标坐标 - 最外面容器的坐标 - 滤镜图的宽(高)的/2
 Top = Top<0?0:Top>maxHeight?maxHeight:Top;
 Left = Left<0?0:Left>maxWidth?maxWidth:Left;
 showimg.style.top = Top + "px";
 showimg.style.left = Left + "px";
 bigimg.style.background = "url("+small_url+") -"+Left*num+"px -"+Top*num+"px no-repeat";
};
smalmg.onmouseout = function(){
 showimg.style.display="none";
 bigimg.style.background ="";
 bigimg.style.display="none"
};
function mousePosition(ev) {
 return {
   x:ev.clientX + (document.body.scrollLeft || document.documentElement.scrollLeft),
   y:ev.clientY + (document.body.scrollTop || document.documentElement.scrollTop)
 }
}

2.微博分享

<script type="text/javascript" src="http://v3.jiathis.com/code/jiathis_r.js?uid=1342582394583517&type=left&amp;move=0&amp;btn=l5.gif" charset="utf-8"></script>