表格中两行的颜色交替显示
<table id="main_table">
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
<tr>
<td width="100">a</td>
<td width="100">b</td>
</tr>
</table>
<script>
//
function setColor(curElement)
{
curElement.style.backgroundColor="#DDEEFF";
curElement.style.color="#000000";
}
function resetColor(curElement)
{
if(curElement.rowIndex%2==0){
curElement.style.backgroundColor="#E7E7E7";
}else{
curElement.style.backgroundColor="#FFFFFF";
}
curElement.style.color="black";
}
//动态产生一个层，用来控制每行颜色的变化
document.writeln('<div id="onmouse" style="display:none" onmouseover="setColor(this)" onmouseout="resetColor(this)"></div>');
var sTable = document.all.main_table;//得到指定表格id
if (sTable)
for (var i=0; i<sTable.rows.length; i++)
{
if(i%2==0){
sTable.rows[i].style.backgroundColor="#C2D8E0";
}else{
sTable.rows[i].style.backgroundColor="#ffffff";
}
//调用层中的方法，改变鼠标所在行的颜色
sTable.rows[i].onmouseover=document.all.onmouse.onmouseover;
sTable.rows[i].onmouseout=document.all.onmouse.onmouseout;
}
</script>