i have a jquery animate function which i want to call if the selectedvalue for my dropdown list is X

       <script>
    $(function () {
        var state = true;
        ($("#button").click)(function () {
            if (state) {
                $("#effect").animate({
                    backgroundColor: "#aa0000",
                    color: "#fff",
                    width: 500
                }, 1000);
                  } else {
                $("#effect").animate({
                    backgroundColor: "#fff",
                    color: "#000",
                    width:500

                }, 1000);
            }
            state = !state;
        });
    });