在FF中点击的效果会有些问题，当点击第一行单元格变色，点击第二个时第一个颜色不恢复原来无色的状态．
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>单元格背景色鼠标响应</title>
<script language="javascript">
<!--
var aTDClick=new Array(3);
function onColor(td,n)
{
if(!aTDClick[n-1]){
td.style.backgroundColor='#FFFF99';
td.style.color='#0600FF';
}else{
td.style.backgroundColor='#FF6699';
td.style.color='#0600FF';
}
}
function onClickColor(td,n)
{
switch(n)
{
case 1:
if(aTDClick[0]!==true){
td.style.backgroundColor='#FF6699';
td.style.color='#0600FF';
aTDClick[0]=true;
}else{
TR1.style.backgroundColor='';
TR1.style.color='';
aTDClick[0]=false;
}
TR2.style.backgroundColor='';
TR2.style.color='';
TR3.style.backgroundColor='';
TR3.style.color='';
aTDClick[1]=false;
aTDClick[2]=false;
break;
case 2:
if(aTDClick[1]!==true){
td.style.backgroundColor='#FF6699';
td.style.color='#0600FF';
aTDClick[1]=true;
}else{
TR2.style.backgroundColor='';
TR2.style.color='';
aTDClick[1]=false;
}
TR1.style.backgroundColor='';
TR1.style.color='';
TR3.style.backgroundColor='';
TR3.style.color='';
aTDClick[0]=false;
aTDClick[2]=false;
break;
case 3:
if(aTDClick[2]!==true){
td.style.backgroundColor='#FF6699';
td.style.color='#0600FF';
aTDClick[2]=true;
}else{
TR3.style.backgroundColor='';
TR3.style.color='';
aTDClick[2]=false;
}
TR2.style.backgroundColor='';
TR2.style.color='';
TR1.style.backgroundColor='';
TR1.style.color='';
aTDClick[1]=false;
aTDClick[0]=false;
break;
}
}
function offColor(td,n)
{
if(!aTDClick[n-1]){
td.style.backgroundColor='';
td.style.color='';
}else{
td.style.backgroundColor='#FF6699';
td.style.color='#0600FF';
}
}
-->
</script>
<style type="text/css">
<!--
.light {
font: normal 9pt "宋体";
color: #000000;
text-decoration: none;
background: #FFFFFF;
cursor: default;
}
.tdstyle {
border: 1px dashed #0099CC;
}
-->
</style>
</head>
<body>
<table width="100%" border="0" cellspacing="4" cellpadding="0">
<tr id="TR1" class="light" onMouseOver="onColor(this,1);" onMouseOut="offColor(this,1);" onClick="onClickColor(this,1);">
<td class="tdstyle" height="25">第一行</td>
</tr>
<tr id="TR2" class="light" onMouseOver="onColor(this,2);" onMouseOut="offColor(this,2);" onClick="onClickColor(this,2);">
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