<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
window.onload = function() {
var oR = document.getElementById('reverse');
var oC = document.getElementById('c1');
oR.onclick = function() {
/* if (oC.checked == true) {
oC.checked = false;
} else {
oC.checked = true;
} */
oC.checked = !oC.checked;
}
}
</script>
</head>
<body>
<input type="button" value="單個反選框反選" id="reverse">
<input type="checkbox" name="" id="c1">
<script></script>
</body>
</html>
運行結果
