<!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=utf-8" />
<title>checkbox的选中事件</title>
<style type="text/css">
div{ width:200px; height:200px; border:1px solid #CCC; color:#00C;}
table { width:400px; border:1px solid #999; border-collapse:collapse; }
table tr { width:400px; height:100px; border:1px solid #999; }
.select { display:none;}
</style>
<script type="text/javascript">
window.onload = function(){
var DEFAULT_VERSION = "8.0";
var browser = navigator.userAgent;//获取浏览器版本信息
var safariVersion;
//alert(navigator.userAgent);
if(browser.indexOf("MSIE")>0){//判断是否是IE浏览器
safariVersion = browser.match(/MSIE ([\d.]+)/)[1];
if(safariVersion <= DEFAULT_VERSION){
var aInput = getClassNames("select_tr","input");
var aTr = getClassNames("select","input");
}else{
var aInput = document.getElementsByClassName("select_tr");
var aTr = document.getElementsByClassName("select");
}
}else{
var aInput = document.getElementsByClassName("select_tr");
var aTr = document.getElementsByClassName("select");
}
for(var i=0;i<aInput.length;i++){
aInput[i].index = i;
aInput[i].onclick = function(){
alert(this);
if(this.checked){
aTr[this.index].style.display = "block";
}else{
aTr[this.index].style.display = "none";
}
}
}
function getClassNames(classStr,tagName)
{
if(document.getElementsByClassName){//判断浏览器是否兼容getElementsByClassName属性
//浏览器兼容getElementsByClassName属性,则可直接使用document.getElementsByClassName
return document.getElementsByClassName(classStr)
}else{//浏览器不兼容getElementsByClassName的情况下
var nodes = document.getElementsByTagName(tagName),ret = [];
for(i = 0; i < nodes.length; i++){
if(hasClass(nodes[i],classStr)){
ret.push(nodes[i]);
}
}
return ret;
}
}
function hasClass(tagStr,classStr){
var arr=tagStr.className.split(/\s+/ ); //这个正则表达式是因为class可以有多个,判断是否包含
for (var i=0;i<arr.length;i++){
if (arr[i]==classStr){
return true ;
}
}
return false ;
}
}
</script>
</head>
<body>
<label><input type="checkbox" value="NBA" class="select_tr">NBA</label>
<label><input type="checkbox" value="football" class="select_tr"">足球</label>
<label><input type="checkbox" value="badminton" class="select_tr">羽毛球</label>
<table>
<tr>
<td>main content</td>
</tr>
<tr class="select" id="first">
<td>NBA</td>
</tr>
<tr class="select" id="second">
<td>足球</td>
</tr>
<tr class="select" id="third">
<td>羽毛球</td>
</tr>
<tr>
<td>others content</td>
</tr>
</table>
</body>
</html>