这小段js为什么不起作用?
<script language="javascript">
var element = document.getElementsById("c_21");
element.style["background-color"]="blue";
</script>
</head>
<body>
<div id="c_21" style="cursor:pointer;margin:0px;border-spacing:0px;border:1px outset #6f6f8f;color:#ffcfcf;
background-color:#3f3f4f;padding:3px 20px 3px 20px;" tabindex="0">
Button
</div>
问题点数：20、回复次数：2Top
1 楼meizz（梅花雪）回复于 2006-02-16 16:44:02 得分 20
对对象的引用出现在对象未加载之前，顺序不对。
<body>
<div id="c_21" style="cursor:pointer;margin:0px;border-spacing:0px;border:1px outset #6f6f8f;color:#ffcfcf;
background-color:#3f3f4f;padding:3px 20px 3px 20px;" tabindex="0">
Button
</div>
<script language="javascript">
var element = document.getElementById("c_21");
element.style.backgroundColor = "blue";
</script>Top
2 楼jplayer（ssssssss）回复于 2006-02-16 16:52:04 得分 0
谢谢高手Top
