js 分享到按钮

基础的思路，可以在此基础加强
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>js分享到</title>
<style>
*{margin:0; padding:0;}
#div1{width:100px; height:200px; position:absolute; left:-100px; background:red;}
#div2{width:50px; height:100px; background:blue; position:absolute; right:-50px; top:50px;}
</style>
<script>
window.onload=function(){
  var oDiv1=document.getElementById('div1');
  var oDiv2=document.getElementById('div2');
  var Timer=null;                 //全局定时器
  oDiv1.onmouseover=function(){   //此处用了冒泡
    startMove(0,10); 
  }
  oDiv1.onmouseout=function(){
    startMove(-100,-10);  
  }
  
  function startMove(target,speed){
      clearInterval(Timer);          //每次只开一个定时器，
      Timer=setInterval(function(){
        if(oDiv1.offsetLeft==target){     //判断目的地
            clearInterval(Timer);
        } else{
            oDiv1.style.left=oDiv1.offsetLeft+speed+'px';     
        }   
      },30);
  }
}
</script>
</head>
<body>
<div id="div1">
  <div id="div2">
    分享到
  </div>
</div>
<script>

</script>
</body>
</html>