jq操作checkbox[disabled="disabled"]跳过全选(不操作)

$("#select").live("click", function () {
        var checkboxs = document.getElementsByName("list");
        for (var i = 0; i < checkboxs.length; i++) {
            var e = checkboxs[i];
            if (e.disabled != true) //continue;
                e.checked = !e.checked;
        }
    });


    <input type="checkbox" id="select" />
    <input type="checkbox" name="list"  value="我被禁用了" disabled="disabled" />
    <input type="checkbox" name="list" value="我未被禁用" />
    <input type="checkbox" name="list"  value="我未被禁用" />