<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>页面上有10个多选框，实现三个按钮(重置、反选、全选)功能</title>
</head>
<body>
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<input type="checkbox">
<button id="reset">重置</button>
<button id="invert">反选</button>
<button id="all">全选</button>
<script>
var reset=document.getElementById('reset');
var invert=document.getElementById('invert');
var all=document.getElementById('all');
var checkBox=document.getElementsByTagName('input');
reset.addEventListener('click',function () {
for(var i=0;i<checkBox.length;i++){
checkBox[i].checked=false;
}
});
invert.addEventListener('click',function () {
for(var i=0;i<checkBox.length;i++){
/*if(checkBox[i].checked==true){
checkBox[i].checked=false;
}else {
checkBox[i].checked=true;
}*/
checkBox[i].checked = !checkBox[i].checked
}
});
all.addEventListener('click',function () {
for(var i=0;i<checkBox.length;i++){
checkBox[i].checked=true;
}
})
</script>
</body>
</html>