chrome查看js报错Uncaught SyntaxError: Unexpected string

$(function({
        $("#directionSelect").change(function(){
         
            $.ajax({
                url:"",
                success:function(data){
                    if(data.state=="fail"){
                        alert("系统繁忙,请稍后再试!");
                    }else{
                     
                    }
                }
            });
        });
    });