javascript之复选框

来源：互联网发布：人变老的软件编辑：程序博客网时间：2024/05/18 02:46

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script>

window.onload = function(){
selAll = document.getElementById("selAll");
hobbys = document.getElementsByName("hobby");
fx = document.getElementById("fx");

//全选事件
selAll.onclick = function(){
//全选
if(selAll.checked == true){
for(var i=0;i<hobbys.length;i++){
hobbys[i].checked = true;
}
}else{
for(var i=0;i<hobbys.length;i++){
hobbys[i].checked = false;
}
}
}

//反选
fx.onclick = function(){

for (var i=0;i<hobbys.length;i++) {
var b = hobbys[i];
if(b.checked == true){
b.checked = false;
}else{
b.checked = true;
}
}
}
}
</script>
</head>
<body>
<input type="checkbox" name="" id="selAll" />全选
<button id="fx">反选</button>
<br>
<input type="checkbox" name="hobby" />篮球
<input type="checkbox" name="hobby" />足球
<input type="checkbox" name="hobby" />乒乓球
<input type="checkbox" name="hobby" />羽毛球
<input type="checkbox" name="hobby" />排球

</body>
</html>

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