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JS blink lib
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/*
 * Copyright (C) 2011 Ovea 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
(function($) {

    $.fn.blink = function(opts) {
        var options = $.extend({
            delay: 500,
            until: function() {
                return false;
            }
        }, opts);
        return this.each(function() {
            var id = $(this).data('_blinker');
            if (!id) {
                var obj = $(this);
                if (!options.until.call(obj)) {
                    id = setInterval(function() {
                        if (options.until.call(obj)) {
                            $(obj).css('visibility', 'visible').removeData('_blinker');
                            clearInterval(id);
                        } else {
                            if ($(obj).css("visibility") == "visible") {
                                $(obj).css('visibility', 'hidden');
                            }
                            else {
                                $(obj).css('visibility', 'visible');
                            }
                        }
                    }, options.delay);
                    $(this).data('_blinker', id);
                }
            }
        });
    };

    $.fn.unblink = function() {
        return this.each(function() {
            var id = $(this).data('_blinker');
            if (id) {
                $(this).removeData('_blinker');
                clearInterval(id);
            }
        });
    };

}(jQuery));