<html>
<head>
<title>网页抖动</title>
</head>
<body>
<script language="javascript">
function shake(){
for (i = 10; i > 0; i--){
for (j = 5; j > 0; j--){
window.top.moveBy(0,i);
window.top.moveBy(i,0);
window.top.moveBy(0,-i);
window.top.moveBy(-i,0);
}
}
}
</script>
<input type="button" value="窗口振动" onClick="shake();">
</body>
</html>
求大神看看，火狐，opera里都没效果。是不是代码哪里出错了
<head>
<title>网页抖动</title>
</head>
<body>
<script language="javascript">
function shake(){
for (i = 10; i > 0; i--){
for (j = 5; j > 0; j--){
window.top.moveBy(0,i);
window.top.moveBy(i,0);
window.top.moveBy(0,-i);
window.top.moveBy(-i,0);
}
}
}
</script>
<input type="button" value="窗口振动" onClick="shake();">
</body>
</html>
求大神看看，火狐，opera里都没效果。是不是代码哪里出错了
