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js控制表格隔行變色

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<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>js控制隔行變色</title>
</head>
<body>
	<table id="tb1" border="1" border-collapse="collapse" cellpadding="5" width="400" height="20" cellspacing="0" bordercolor="#99cccc">
		<thead>
			<tr>
				<td>編號</td>
				<td>作品</td>
				<td>時間</td>
			</tr>
		</thead>
		<tbody id="tb2">
			<tr>
				<td>1</td>
				<td>回憶三部曲</td>
				<td>1995</td>
			</tr>
			<tr>
				<td>2</td>
				<td>未麻的部屋</td>
				<td>1997</td>
			</tr>
			<tr>
				<td>3</td>
				<td>千年女優</td>
				<td>2001</td>
			</tr>
			<tr>
				<td>4</td>
				<td>妄想代理人</td>
				<td>2004</td>
			</tr>
			<tr>
				<td>5</td>
				<td>紅辣椒</td>
				<td>2006</td>
			</tr>
			<tr>
				<td>6</td>
				<td>東京教父</td>
				<td>2003</td>
			</tr>
		</tbody>
	</table>

	<script type="text/javascript">
     window.onload=function tablecolor(){
     	var t_name = document.getElementById("tb2");
     	var t_len = t_name.getElementsByTagName("tr");
     	for(var i=0;i<=t_len.length;i++){
     		//偶數行時執行
     		if(i%2 == 0){
     			t_len[i].style.backgroundColor="#ffcccc";
             //添加鼠標經過事件
     			t_len[i].onmouseover = function(){
     				this.style.backgroundColor="#ccffff"
     			}
     			//添加鼠標離開事件
     			t_len[i].onmouseout = function(){
     				this.style.backgroundColor="#ffcccc"     			
     			}
     		}
     		else{
     			t_len[i].style.backgroundColor="#ffffcc";

     			t_len[i].onmouseover = function(){
     				this.style.backgroundColor="#ccffff"
     			}
     			t_len[i].onmouseout = function(){
     				this.style.backgroundColor="#ffffcc"
     		}
     	}
     }
 }
	</script>
</body>
</html>

  

js控制表格隔行變色