jQuery.fn.liveSearch = function(conf) {
    var config = jQuery.extend({
        url: '/search-results.php?q=',
        id: 'jquery-live-search',
        duration: 400,
        typeDelay: 200,
        loadingClass: 'loading',
        onSlideUp: function() { },
        uptadePosition: false
    }, conf);

    var liveSearch = jQuery('#' + config.id);

    // Create live-search if it doesn't exist
    if (!liveSearch.length) {
        liveSearch = jQuery('<div id="' + config.id + '"></div>')
						.appendTo(document.body)
						.hide()
						.slideUp(0);

        // Close live-search when clicking outside it
        jQuery(document.body).click(function(event) {
            var clicked = jQuery(event.target);

            if (!(clicked.is('#' + config.id) || clicked.parents('#' + config.id).length || clicked.is('input'))) {
                liveSearch.slideUp(config.duration, function() {
                    config.onSlideUp();
                });
            }
        });
    }

    return this.each(function() {
        var input = jQuery(this).attr('autocomplete', 'off');
        var liveSearchPaddingBorderHoriz =
            parseInt(liveSearch.css('paddingLeft'), 10) +
            parseInt(liveSearch.css('paddingRight'), 10) +
            parseInt(liveSearch.css('borderLeftWidth'), 10) +
            parseInt(liveSearch.css('borderRightWidth'), 10);

        if (isNaN(liveSearchPaddingBorderHoriz)) {
            liveSearchPaddingBorderHoriz = 0;
        }

        // Re calculates live search's position
        var repositionLiveSearch = function() {
            var tmpOffset = input.offset();
            var inputDim = {
                left: tmpOffset.left,
                top: tmpOffset.top,
                width: input.outerWidth(),
                height: input.outerHeight()
            };

            inputDim.topPos = inputDim.top + inputDim.height;
            inputDim.totalWidth = inputDim.width - liveSearchPaddingBorderHoriz;

            var left = inputDim.left;
            var top = inputDim.topPos;
            var width = inputDim.totalWidth;


            liveSearch.css({
                position: 'absolute',
                left: inputDim.left + 'px',
                top: inputDim.topPos + 'px',
                width: inputDim.totalWidth + 'px'
            });
        };

        // Shows live-search for this input
        var showLiveSearch = function() {
            // Always reposition the live-search every time it is shown
            // in case user has resized browser-window or zoomed in or whatever
            repositionLiveSearch();

            // We need to bind a resize-event every time live search is shown
            // so it resizes based on the correct input element
            $(window).unbind('resize', repositionLiveSearch);
            $(window).bind('resize', repositionLiveSearch);

            liveSearch.slideDown(config.duration);
        };

        // Hides live-search for this input
        var hideLiveSearch = function() {
            liveSearch.slideUp(config.duration, function() {
                config.onSlideUp();
            });
        };

        input
        // On focus, if the live-search is empty, perform an new search
        // If not, just slide it down. Only do this if there's something in the input
			.focus(function() {
			    if (this.value !== '') {
			        // Perform a new search if there are no search results
			        if (liveSearch.html() == '') {
			            this.lastValue = '';
			            input.keyup();
			        }
			        // If there are search results show live search
			        else {
			            // HACK: In case search field changes width onfocus
			            setTimeout(showLiveSearch, 1);
			        }
			    }
			})
        // Auto update live-search onkeyup
			.keyup(function() {
			    // Don't update live-search if it's got the same value as last time
			    if (this.value != this.lastValue) {
			        input.addClass(config.loadingClass);

			        var q = encodeURIComponent(this.value);

			        // Stop previous ajax-request
			        if (this.timer) {
			            clearTimeout(this.timer);
			        }

			        // Start a new ajax-request in X ms
			        this.timer = setTimeout(function() {
			            jQuery.get(config.url + q, function(data) {
			                input.removeClass(config.loadingClass);

			                // Show live-search if results and search-term aren't empty
			                if (data.length && q.length) {
			                    liveSearch.html(data);
			                    showLiveSearch();
			                }
			                else {
			                    hideLiveSearch();
			                }
			            });
			        }, config.typeDelay);

			        this.lastValue = this.value;
			    }
			});
    });
};