求大神解决为什么没效果
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html"; charset="utf-8" />
<title>JS动画</title>
<style>
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>
window.onload=function(){
var oDiv=document.getElementID('div1');
oDiv.onmouseover=function(){
startMove();
}
}
function startMove(){
var oDiv=document.getElementID('div1');
setInterval(function(){
oDiv.style.left = oDiv.offsetLeft+10+'px';
},30)
}
</script>
</head>
<body>
<div id="div1">
<span id="share">分享</span>
</div>
</body>
</html>
