<hr>水平线
input.checked=! input.checked
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<button onclick="selectAll()">全选</button>
<button onclick="Cancel()">取消</button>
<button onclick="reverse()">反选</button>
<hr>
<table border="1px" >
<tr>
<td><input type="checkbox"></td>
<td>111</td>
<td>111</td>
<td>111</td>
</tr>
<tr>
<td><input type="checkbox"></td>
<td>222</td>
<td>222</td>
<td>222</td>
</tr>
<tr>
<td><input type="checkbox"></td>
<td>333</td>
<td>333</td>
<td>333</td>
</tr>
</table>
<script>
function selectAll() {
var inputs=document.getElementsByTagName("input");
for (var i=0;i<inputs.length;i++){
var input=inputs[i]
input.checked=true;
}
}
function Cancel() {
var inputs=document.getElementsByTagName("input");
for (var i=0;i<inputs.length;i++){
var input=inputs[i]
input.checked=false;
}
}
function reverse() {
var inputs=document.getElementsByTagName("input");
for (var i=0;i<inputs.length;i++){
var input=inputs[i];
input.checked=!input.checked;
// if(input.checked){
// input.checked=false
// }else {
// input.checked=true
// }
}
}
</script>
</body>
</html>
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