多选框js

点击取消,点击选中

获取表头框

var checkAll = document.getElementById('tz');

获取列表框

var checkAll = document.getElementById('tz');

$(function(){
	var checkAll = document.getElementById('tz');
	var checkList = document.getElementsByName('tz1');//选择框列表
	checkAll.onclick = function () {
	        if (this.checked) {
	            for (let i = 0; i < checkList.length; i++) {
	            	checkList[i].checked = true;    //每个复选框设置为勾选状态
	            }
	        } else {
	            for (i = 0; i < checkList.length; i++) {
	            	checkList[i].checked = false;    //每个复选框设置为不勾选状态
	            }
	        }
	  }
 })