Jquery CheckBox全选方法代码附js checkbox全选反选代码

function CheckAll(val) {
$("input[name='chkJob']").each(function() {
this.checked = val;
});
$("#chkAll").attr("checked", val);//设定全选按钮状态
}

//全选
function checkall() {
var all = document.getElementsByTagName("input");
for (var i = 0; i < all.length; i++) {
if (all[i].type == "checkbox") {
all[i].checked = true;
}
}
}
//反选
function checknull() {
var all = document.getElementsByTagName("input");
for (var i = 0; i < all.length; i++) {
if (all[i].type == "checkbox") {
all[i].checked = false;
}
}
}