<title>无标题文档</title>
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//清空
function backs(){
var td= document.getElementsByTagName("td");
for(var i=0;i<td.length;i++){
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//浏览器加载时，先把表格的事件先加载好,点击表格时触发
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td[i].onclick = function() {
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this.style.background = ‘red‘;
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window.onload=selectTable;
</script>
</head>
<body>
<table width="200" border="1">
<tr>
<td>商品名称</td>
<td>数量</td>
<td>价格</td>
<td>合计</td>
</tr>
<tr>
<td onclick="changeBackgound(this)">手机</td>
<td onclick="changeBackgound(this)">1</td>
<td onclick="changeBackgound(this)">888</td>
<td onclick="changeBackgound(this)">888</td>
</tr>
<tr>
<td>手表</td>
<td>1</td>
<td>999</td>
<td>999</td>
</tr>
</table>
</body>
原文：http://www.cnblogs.com/danmao/p/3817555.html