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jQuery.fn.CaratSlider = function (settings) {
    var selects = jQuery(this);

    //accessible slider options
    var options = jQuery.extend({
        labels: 3, //number of visible labels
        tooltip: true, //show tooltips, boolean
        tooltipSrc: 'text', //accepts 'value' as well
        labelSrc: 'value', //accepts 'value' as well,
        sliderOptions: null
    }, settings);

    //handle ID attrs - selects each need IDs for handles to find them
    var handleIds = (function () {
        var tempArr = [];
        $(options.values).each(function (i) {
            tempArr.push('handle_value' + (i + 1));
        });
        return tempArr;
    })();

    //array of all option elements in select element (ignores optgroups)
    var selectOptions = (function () {
        var opts = [];

        var min = parseFloat(options["min"]);
        var max = parseFloat(options["max"]);
        var step = parseFloat(options["step"]);

        while (min < max) {
            opts.push({ value: min.toFixed(2), text: min.toFixed(2) });
            min = min + step;
        }

        return opts;
    })();

    //array of opt groups if present
    ////    var groups = (function() {
    ////        if (selects.eq(0).find('optgroup').size() > 0) {
    ////            var groupedData = [];
    ////            selects.eq(0).find('optgroup').each(function(i) {
    ////                groupedData[i] = {};
    ////                groupedData[i].label = jQuery(this).attr('label');
    ////                groupedData[i].options = [];
    ////                jQuery(this).find('option').each(function() {
    ////                    groupedData[i].options.push({ text: jQuery(this).text(), value: jQuery(this).attr('value') });
    ////                });
    ////            });
    ////            return groupedData;
    ////        }
    ////        else return null;
    ////    })();

    //check if obj is array
    function isArray(obj) {
        return obj.constructor == Array;
    }
    //return tooltip text from option index
    function ttText(optIndex) {
        try {
            return (options.tooltipSrc == 'text') ? selectOptions[optIndex].text : selectOptions[optIndex].value;
        }
        catch (err) {
            return "";
        }
    }

    function ResetCarat() {
        var caratMin = $("#handle_value1 .ttContent").text();
        var caratMax = $("#handle_value2 .ttContent").text();

        var handle = $("#handle_value1").parent();

        var fli = $(handle).find("li").first();
        var lli = $(handle).find("li").last();

        $($(fli).find("span").first()).html(caratMin);
        $($(lli).find("span").first()).html(caratMax);
    }

    //plugin-generated slider options (can be overridden)
    var sliderOptions = {
        step: 1,
        min: 0,
        orientation: 'horizontal',
        max: selectOptions.length - 1,
        range: settings["values"].length > 1, //multiple select elements = true
        slide: function (e, ui) {//slide function
            var thisHandle = jQuery(ui.handle);
            //handle feedback 
            var textval = ttText(ui.value);
            thisHandle
					.attr('aria-valuetext', textval)
					.attr('aria-valuenow', ui.value)
					.find('.ui-slider-tooltip .ttContent')
						.text(textval);

            //control original select menu
            //var currSelect = jQuery('#' + thisHandle.attr('id').split('handle_value')[1]);
            //currSelect.find('option').eq(ui.value).attr('selected', 'selected');

            ResetCarat();
        },
        values: (function () { return settings["values"]; })()
    };

    //slider options from settings
    options.sliderOptions = (settings) ? jQuery.extend(sliderOptions, settings.sliderOptions) : sliderOptions;

    //select element change event	
    selects.bind('change keyup click', function () {
        var thisIndex = jQuery(this).get(0).selectedIndex;
        var thisHandle = jQuery('#handle_value' + jQuery(this).attr('id'));
        var handleIndex = thisHandle.data('handleNum');
        thisHandle.parents('.ui-slider:eq(0)').slider("values", handleIndex, thisIndex);
    });


    //create slider component div
    var sliderComponent = jQuery('<div></div>');

    //CREATE HANDLES
    $(options.values).each(function (i) {
        var hidett = '';

        //associate label for ARIA
        var thisLabel = jQuery('label[for=' + jQuery(this).attr('id') + ']');
        //labelled by aria doesn't seem to work on slider handle. Using title attr as backup
        var labelText = (thisLabel.size() > 0) ? 'Slider control for ' + thisLabel.text() + '' : '';
        var thisLabelId = thisLabel.attr('id') || thisLabel.attr('id', 'label_' + handleIds[i]).attr('id');

        if (options.tooltip == false) { hidett = ' style="display: none;"'; }
        jQuery('<a ' +
    				'href="#" tabindex="0" ' +
    				'id="' + handleIds[i] + '" ' +
    				'class="ui-slider-handle" ' +
    				'role="slider" ' +
    				'aria-labelledby="' + thisLabelId + '" ' +
    				'aria-valuemin="' + options.min + '" ' +
    				'aria-valuemax="' + options.max + '" ' +
    				'aria-valuenow="' + options.values[i] + '" ' +
    				'aria-valuetext="' + ttText(options.values[i]) + '" ' +
    			'><span class="screenReaderContext">' + labelText + '</span>' +
    			'<span class="ui-slider-tooltip ui-widget-content ui-corner-all"' + hidett + '><span class="ttContent"></span>' +
    			'<span class="ui-tooltip-pointer-down ui-widget-content"><span class="ui-tooltip-pointer-down-inner"></span></span>' +
    			'</span></a>')
    			.data('handleNum', i)
    			.appendTo(sliderComponent);
    });

    //CREATE SCALE AND TICS

    //write dl if there are optgroups
    //    if (groups) {
    //        var inc = 0;
    //        var scale = sliderComponent.append('<dl class="ui-slider-scale ui-helper-reset" role="presentation"></dl>').find('.ui-slider-scale:eq(0)');
    //        jQuery(groups).each(function(h) {
    //            scale.append('<dt style="width: ' + (100 / groups.length).toFixed(2) + '%' + '; left:' + (h / (groups.length - 1) * 100).toFixed(2) + '%' + '"><span>' + this.label + '</span></dt>'); //class name becomes camelCased label
    //            var groupOpts = this.options;
    //            jQuery(this.options).each(function(i) {
    //                var style = (inc == selectOptions.length - 1 || inc == 0) ? 'style="display: none;"' : '';
    //                var labelText = (options.labelSrc == 'text') ? groupOpts[i].text : groupOpts[i].value;
    //                scale.append('<dd style="left:' + leftVal(inc) + '"><span class="ui-slider-label">' + labelText + '</span><span class="ui-slider-tic ui-widget-content"' + style + '></span></dd>');
    //                inc++;
    //            });
    //        });
    //    }
    //    //write ol
    //    else {

    var scale = sliderComponent.append('<ol class="ui-slider-scale ui-helper-reset" role="presentation"></ol>').find('.ui-slider-scale:eq(0)');
    jQuery(selectOptions).each(function (i) {
        var style = (i == selectOptions.length - 1 || i == 0) ? 'style="display: none;"' : '';
        var labelText = (options.labelSrc == 'text') ? this.text : this.value;
        scale.append('<li style="left:' + leftVal(i) + '"><span class="ui-slider-label">' + labelText + '</span></li>');
    });

    //    }

    function leftVal(i) {
        return (i / (selectOptions.length - 1) * 100).toFixed(2) + '%';
    }

    //show and hide labels depending on labels pref
    //show the last one if there are more than 1 specified
    if (options.labels > 1) sliderComponent.find('.ui-slider-scale li:last span.ui-slider-label, .ui-slider-scale dd:last span.ui-slider-label').addClass('ui-slider-label-show');

    //set increment
    var increm = Math.max(1, Math.round(selectOptions.length / options.labels));
    //show em based on inc
    for (var j = 0; j < selectOptions.length; j += increm) {
        if ((selectOptions.length - j) > increm) {//don't show if it's too close to the end label
            sliderComponent.find('.ui-slider-scale li:eq(' + j + ') span.ui-slider-label, .ui-slider-scale dd:eq(' + j + ') span.ui-slider-label').addClass('ui-slider-label-show');
        }
    }

    //style the dt's
    sliderComponent.find('.ui-slider-scale dt').each(function (i) {
        jQuery(this).css({
            'left': ((100 / (groups.length)) * i).toFixed(2) + '%'
        });
    });

    //inject and return 
    sliderComponent
	.insertAfter(jQuery(this).eq(this.length - 1))
	.slider(options.sliderOptions)
	.attr('role', 'application')
	.find('.ui-slider-label')
	.each(function () {
	    jQuery(this).css('marginLeft', -jQuery(this).width() / 2);
	});

    //update tooltip arrow inner color
    sliderComponent.find('.ui-tooltip-pointer-down-inner').each(function () {
        var bWidth = jQuery('.ui-tooltip-pointer-down-inner').css('borderTopWidth');
        var bColor = jQuery(this).parents('.ui-slider-tooltip').css('backgroundColor')
        jQuery(this).css('border-top', bWidth + ' solid ' + bColor);
    });

    var values = sliderComponent.slider('values');

    if (isArray(values)) {
        jQuery(values).each(function (i) {
            sliderComponent.find('.ui-slider-tooltip .ttContent').eq(i).text(ttText(this));
        });
    }
    else {
        sliderComponent.find('.ui-slider-tooltip .ttContent').eq(0).text(ttText(values));
    }

    ResetCarat();

    return this;
}