這是一個簡單的javascript命令,用於在頁面加載時更改類名。我做錯了什麼,它不工作? http://jsfiddle.net/wtH2Y/4/使用javascript更改css onload
<html>
<head>
<style>
.away {
margin: 30px 0 0 0 !important;
position:fixed;
-webkit-transition: margin 0.6s;
-moz-transition: margin 0.6s;
-o-transition: margin 0.6s;
}
.in {
margin:0;
position:absolute;
}
</style>
<script>
window.onload = function pre-loader() {
document.getElementByClassName('away').className = 'in';
};
</script>
</head>
<div class="away">
this should slide up when the page loads
</div>
相關提示我想我會堅持getElementById。並感謝趕上短跑。 SMH –