gistfile1.txt

function($) {
    /**
     * Show preloader under element
     * 
     * @param {string} height of preloader block
     * @param {string} width of preloader block
     * @return {void}
     */
    $.fn.showPreloader = function(width, height) {
        width = width || '100%';
        height = height || '100%';
        return this.each(function() {
            var blockEl = $(this);
            if (blockEl.css('position') == 'static') {
                blockEl.css('position', 'relative');
            }
            if (blockEl.css('display') != 'inline' ||
                blockEl.css('display') != 'inline-block'
                ) {
                blockEl.attr('display_old', blockEl.css('display'));
                blockEl.css('display', 'block');
            }
            blockEl.prepend(
                $('<div>', {
                    'class': 'preloaders',
                    height: height,
                    width: width
                })
            );
        });
    };
    /**
     * Remove preloader
     * 
     * @return {void}
     */
    $.fn.removePreloader = function() {
        return this.each(function() {
            var blockEl = $(this);
            var preloaders = blockEl.children('.preloaders');
            if (blockEl.attr('display_old')) {
                blockEl.css('display', blockEl.attr('display_old'));
                blockEl.removeAttr('display_old');
            }
            preloaders.remove();
        });
    };
}(jQuery));