JS 实现Div向上浮动的实现代码

<div id="newsOne" onmouseover="CleartTimeInterVal();" onmouseout="resetInterVal();"
style="position: absolute; width: 100px;">
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</div>
<script type='text/javascript'>
var newsOne = document.getElementById("newsOne");
newsOne.style.bottom = 0;
newsOne.style.left = window.screen.availWidth - 100;
var bottom = 0;
function newsScroll() {
if (bottom > (window.screen.availHeight - window.screenTop)) {
bottom = 0;
newsOne.style.bottom = 0;
}
else {
bottom = bottom + 15;
newsOne.style.bottom = bottom;
}
}
var timeid = setInterval(newsScroll, 300);
function CleartTimeInterVal() {
clearInterval(timeid);
}
function resetInterVal() {
timeid = setInterval(newsScroll, 300);
}
</script>