Cómo obtener el valor desplegable de jQuery en el evento de cambio

He agregado dos secuencias de comandos de autocompletar desplegable de interfaz de usuario de jQuery. Ahora quiero obtener ambos valores en el cambio del segundo menú desplegable y quiero almacenarlos por separado en la variable. ¿Como es posible?

¿Alguna idea o sugerencia? Gracias.

Mi violín: muestra

Mi código JS:

(function($) {
            $.widget("ui.combobox", {
                _create: function() {
                    var self = this,
                    select = this.element.hide(),
                    selected = select.children(":selected"),
                    value = selected.val() ? selected.text() : "";
                    var input = this.input = $("<input>").insertAfter(select).val(value).autocomplete({
                        delay: 0,
                        minLength: 0,
                        source: function(request, response) {
                            var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
                            response(select.children("option").map(function() {
                                var text = $(this).text();
                                if (this.value && (!request.term || matcher.test(text)))
                                    return {
                                    label: text.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + $.ui.autocomplete.escapeRegex(request.term) + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>"),
                                    value: text,
                                    option: this
                                };
                            }));
                        },
                        select: function(event, ui) {
                            ui.item.option.selected = true;
                            self._trigger("selected", event, {
                                item: ui.item.option
                            });
                            select.trigger("change");
                        },
                        change: function(event, ui) {
                            if (!ui.item) {
                                var matcher = new RegExp("^" + $.ui.autocomplete.escapeRegex($(this).val()) + "$", "i"),
                                valid = false;
                                select.children("option").each(function() {
                                    if ($(this).text().match(matcher)) {
                                        this.selected = valid = true;
                                        return false;
                                    }
                                });
                                if (!valid) {
                                    // remove invalid value, as it didn't match anything
                                    $(this).val("");
                                    select.val("");
                                    input.data("autocomplete").term = "";
                                    return false;
                                }
                            }
                        }
                    }).addClass("ui-widget ui-widget-content ui-corner-left");

                    input.data("autocomplete")._renderItem = function(ul, item) {
                        return $("<li></li>").data("item.autocomplete", item).append("<a>" + item.label + "</a>").appendTo(ul);
                    };

                    this.button = $("<button type='button'>&nbsp;</button>").attr("tabIndex", -1).attr("title", "Show All Items").insertAfter(input).button({
                        icons: {
                            primary: "ui-icon-triangle-1-s"
                        },
                        text: false
                    }).removeClass("ui-corner-all").addClass("ui-corner-right ui-button-icon").click(function() {
                        // close if already visible
                        if (input.autocomplete("widget").is(":visible")) {
                            input.autocomplete("close");
                            return;
                        }

                        // pass empty string as value to search for, displaying all results
                        input.autocomplete("search", "");
                        input.focus();
                    });
                },

                destroy: function() {
                    this.input.remove();
                    this.button.remove();
                    this.element.show();
                    $.Widget.prototype.destroy.call(this);
                }
            });
        })(jQuery);

        $(function() {
            /*start point value*/
            $("#pick").combobox({
                change: function() {
                    alert("changed");
                }
            });
            $("#toggle").click(function() {
                $("#pick").toggle();
            });
            $("#pick").change(function() {
                var start = this.value;
            });

            /*end point value*/
            $("#drop").combobox({
                change: function() {
                    alert("changed");
                }
            });
            $("#toggle").click(function() {
                $("#drop").toggle();
            });
            $("#drop").change(function() {
                var end = this.value;
            });
        });

Mi código HTML:

<div class="ui-widget">
        <select id="pick">
            <option value="">Select one...</option>
            <option value="1">1</option>
            <option value="2">2</option>
            <option value="3">3</option>
            <option value="4">4</option>
        </select>

        <select id="drop">
            <option value="">Select one...</option>
            <option value="11">11</option>
            <option value="12">12</option>
            <option value="13">13</option>
            <option value="14">14</option>
        </select>
    </div>

Prueba así

 $("#drop").change(function () {
        var end = this.value;
        var firstDropVal = $('#pick').val();
    });

$('#drop').change(
    function() {
        var val1 = $('#pick option:selected').val();
        var val2 = $('#drop option:selected').val();

        // Do something with val1 and val2 ...
    }
);

Si tiene un menú desplegable simple como:

<select name="status" id="status">
    <option value="1">Active</option>
    <option value="0">Inactive</option>
</select>

Entonces puedes usar este código para obtener valor:

$(function(){

 $("#status").change(function(){
     var status = this.value;
     alert(status);
   if(status=="1")
     $("#icon_class, #background_class").hide();// hide multiple sections
  });

});

Agregue probar este código .. Está trabajando grt .......

<body>
<?php
	if (isset($_POST['nav'])) {
		 header("Location: $_POST[nav]");
	}
?>
<form id="page-changer" action="" method="post">
    <select name="nav">
        <option value="">Go to page...</option>
        <option value="http://css-tricks.com/">CSS-Tricks</option>
        <option value="http://digwp.com/">Digging Into WordPress</option>
        <option value="http://quotesondesign.com/">Quotes on Design</option>
    </select>
    <input type="submit" value="Go" id="submit" />
</form>
</body>
</html>

<html>
<head>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script>
$(function() {

    $("#submit").hide();

    $("#page-changer select").change(function() {
        window.location = $("#page-changer select option:selected").val();
    })

});
</script>
</head>