x
 
<html>
<head>
<script type="text/javascript">
function changeColor(color)
{
document.getElementById('x').style.background=color
}
</script>
</head>
<body>
<p>本例演示如何改变文本框的背景颜色。</p>
<p>请把鼠标移动到下面的三个表格单元上,输入框会改变 background-color:</p>
<table width="100%"><tr>
<td bgcolor="red" onmouseover="changeColor('red')"> </td>
<td bgcolor="blue" onmouseover="changeColor('blue')"> </td>
<td bgcolor="green" onmouseover="changeColor('green')"> </td>
</tr></table>
<form>
<input id="x" type="text" value="请把鼠标移动到颜色上面" size="20">
</form>
</body>
</html>