醉了，醉了，求助
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无解</title>
<style type="text/css">
<style type="text/css">
body,div,span{
margin: 0;
padding: 0;
}
#div1 {
width: 200px;
height: 200px;
background: red;
position: relative;
left: -200px;
top: 0;
}
#div1 span {
width: 20px;
height: 50px;
background: blue;
position: absolute;
left: 200px;
top: 75px;
}
</style>
<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) {
clearInterval(timer);
var oDiv = document.getElementById("div1");
timer = setInterval(function() {
var speed = (iTarget - oDiv.offsetLeft) / 20
speed = speed < 0 ? Math.ceil(speed) : Math.floor(speed);
if(oDiv.offsetLeft == iTarget) {
clearInterval(timer);
} else {
oDiv.style.left = oDiv.offsetLeft + speed + "px";
}
}, 30);
}
</script>
</head>
<body>
<div id="div1">
<span id="share">分享</span>
</div>
</body>
</html>
