How to get jQuery dropdown value onchange event

I have added two jQuery UI Dropdown Autocomplete script. Now I want get both value onchange of second dropdown and want to store separately in variable. How it is possible?

Any ideas or suggestions? Thanks.

My Fiddle: Sample

My JS Code:

(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;
			});
		});

My HTML Code:

<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>

Try like this

 $("#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 ...
    }
);

If you have simple dropdown like:

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

Then you can use this code for getting value:

$(function(){

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

});

Add try this code .. Its working 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>