jQuery CheckBox全选、反选

//全选
$("#selectall").bind("click", function () {
var cb = $("#datatablename :checkbox");
cb.attr("checked", true);
});

//全不选
$("#selectnone").bind("click", function () {
var cb = $("#datatablename :checkbox");
cb.attr("checked", false);
});

//反选
$("#selectinvert").bind("click", function () {
var cb = $("#datatablename :checkbox");
cb.each(function () {
this.checked = !this.checked;
});
});

//切换checked选中状态
$("#IsAgree").bind("click", function () {
if ($(this).attr("checked") == "checked") {
$(this).removeAttr("checked")
} else {
$(this).attr("checked", "true");
}
});