1、新建html文档。
2、书写html。
<div class="wrap">
<table>
<thead>
<tr>
<th> <input type="checkbox" id="j_cbAll" />
</th>
<th>姓名</th>
<th>语文得分</th>
<th>数学得分</th>
<th>英文得分</th>
</tr>
</thead>
<tbody id="j_tb">
<tr>
<td><input type="checkbox" /></td>
<td>小名</td>
<td>100</td>
<td>77</td>
<td>75</td>
</tr>
<tr>
<td><input type="checkbox" /></td>
<td>小花</td>
<td>77</td>
<td>71</td>
<td>88</td>
</tr>
<tr>
<td><input type="checkbox" /></td>
<td>小红</td>
<td>88</td>
<td>77</td>
<td>70</td>
</tr>
<tr>
<td><input type="checkbox" /></td>
<td>小牛</td>
<td>50</td>
<td>66</td>
<td>77</td>
</tr>
</tbody>
</table>
</div>
3、书写css样式。
<style>
* { padding: 0; margin: 0; }
.wrap { width: 300px; margin: 20px auto 0; }
table { border-collapse: collapse; border-spacing: 0; border: 1px solid #c0c0c0; width: 300px; }
th, td { border: 1px solid #d0d0d0; color: #404060; padding: 10px; }
th { background-color: #09c; font: bold 12px "微软雅黑"; color: #fff; }
td { font: 12px "微软雅黑"; }
tbody tr { background-color: #f0f0f0; }
tbody tr:hover { cursor: pointer; background-color: #fafafa; }
</style>
4、书写js特效。
<script>
var all = document.getElementById("j_cbAll");
var tbody = document.getElementById("j_tb");
var checkboxs = tbody.getElementsByTagName("input");
all.onclick = function() {
for (var i = 0; i < checkboxs.length; i++) {
var checkbox = checkboxs[i];
checkbox.checked = this.checked;
}
};
for (var i = 0; i < checkboxs.length; i++) {
checkboxs[i].onclick = function() {
var isCheckedAll = true;
for (var i = 0; i < checkboxs.length; i++) {
if (!checkboxs[i].checked) {
isCheckedAll = false;
break;
}
}
all.checked = isCheckedAll;
};
}
</script>
5、查看效果。
