AndrewRayCode

// Usage: $form.find('input[type="checkbox"]').shiftSelectable();
// replace input[type="checkbox"] with the selector to match your list of checkboxes

$.fn.shiftSelectable = function() {
    var lastChecked,
        $boxes = this;

    $boxes.click(function(evt) {
        if(!lastChecked) {
            lastChecked = this;