// shift-select-multiple-checkboxes-like-gmail
    var checkboxes = document.getElementsByName('ftp');
    for (var i = 0; i < checkboxes.length; i++) {
        lastChecked = null;
        checkboxes[i].addEventListener('click', function(e) {
            if (!lastChecked) {
                lastChecked = this;
                return;
            }
            if (e.shiftKey) {
                var thisIndex, lastIndex;
                for (var ii = 0; ii < checkboxes.length; ii++) {
                    if (this == checkboxes[ii]) {
                        thisIndex = ii;
                    }
                    if (lastChecked == checkboxes[ii]) {
                        lastIndex = ii;
                    }
                }
                var start = Math.min(thisIndex, lastIndex);
                var end = Math.max(thisIndex, lastIndex);

                Array.prototype.slice.call(checkboxes).forEach(function(node, i) {
                    if (start <= i && i < end+1) {
                        node.checked = lastChecked.checked;
                    }
                });
            }
        });
    }

});

function checkAll(obj, name) {
    if (typeof obj === 'undefined') {
        console.log(obj);
        return false;
    }
    var checkboxes = document.getElementsByName(name);
    Array.prototype.forEach.call(checkboxes, function(el, i) {
        checkboxes[i].checked = obj.checked;
    });
}