JavaScript动画--水平运动-原创手记-慕课网

<!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>水平运动</title>
<!--样式表-->
<style type="text/css">
* {
    margin: 0;
    padding: 0;
}
#div1 {
    width: 200px;
    height: 200px;
    background: #0FF;
    position: relative;
    left: -200px;
    top: 0;
}
#div1 span {
    width: 20px;
    height: 50px;
    background: #CCC;
    position: absolute;
    color:red;
    /*font:normal 20px/0.5em 'microsoft yahei';*/

    left: 200px;
    top: 75px;
}
</style>

<!--javascript-->
<script type="text/javascript">
window.onload=function(){
    var Odiv = document.getElementById('div1');
    Odiv.onmouseover=function(){
        startMove(0);
    }
        Odiv.onmouseout=function(){
        startMove(-200);
    }
}

var timer=null;
function startMove(iTarget){
    window.clearInterval(timer);    
    var Odiv = document.getElementById('div1');
    var Ospan = document.getElementById('span');
    timer=window.setInterval(function(){
        var speed = 0;
        if(Odiv.offsetLeft>iTarget){
            speed=-10;
            Ospan.innerHTML='向左';
        }else{
            speed=10;
            Ospan.innerHTML='向右';
        }
        if(Odiv.offsetLeft==iTarget){
            window.clearInterval(timer);
            Ospan.innerHTML='分享';
        }else{
            Odiv.style.left=Odiv.offsetLeft+speed+'px';
        }
        },30);
}

</script>
</head>

<body>
<!--内容-->
<div id="div1"><span id="span">分享</span></div>
</body>
</html>