jquery-ui – jQueryUI .dialog(“close”)在ajax调用后不起作用

我使用jQueryUI的对话框与模态窗体选项打开一个弹出窗体。当用户单击按钮时，它将其输入提交到数据库，然后关闭对话框。一切都在工作，除非关闭对话框。 (手动关闭按钮的工作原理;它从PHP数据库脚本返回后不会自动关闭，这是脚本代码(我试图加粗不行的行，显然你不能嵌入代码标签中的粗体) ，但线条被双星号包围，使其脱颖而出，这些不是实际代码的一部分！)

<script>
    $(function() {
        // a workaround for a flaw in the demo system (http://dev.jqueryui.com/ticket/4375),ignore!
        $( "#dialog:ui-dialog" ).dialog( "destroy" );

        var name = $( "#name" ),email = $( "#email" ),company = $( "#company" ),plate = $( "#plate"),allFields = $( [] ).add( name ).add( email ).add( company ).add( plate ),tips = $( ".validatetips" );

        function updatetips( t ) {
            tips
                .text( t )
                .addClass( "ui-state-highlight" );
            setTimeout(function() {
                tips.removeClass( "ui-state-highlight",1500 );
            },500 );
        }

        function checkLength( o,n,min,max ) {
            if ( o.val().length > max || o.val().length < min ) {
                o.addClass( "ui-state-error" );
                updatetips( "Length of " + n + " must be between " +
                    min + " and " + max + "." );
                return false;
            } else {
                return true;
            }
        }

        function checkRegexp( o,regexp,n ) {
            if ( !( regexp.test( o.val() ) ) ) {
                o.addClass( "ui-state-error" );
                updatetips( n );
                return false;
            } else {
                return true;
            }
        }

        $( "#dialog-form" ).dialog({
            autoOpen: false,height: 390,width: 350,position: 'top',modal: true,zIndex: 3000,buttons: {
                "Submit your plate": function() {
                    var bValid = true;
                    allFields.removeClass( "ui-state-error" );

                    bValid = bValid && checkLength( plate,"plate code",1,7 );
                    bValid = bValid && checkLength( email,"email",6,80 );
                    bValid = bValid && checkLength( company,"company",100);

                    bValid = bValid && checkRegexp( email,/^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?$/i,"eg. ismi@instoREMARKeter.org" );


                    if ( bValid ) {

                            var nameStr = name.val();
                            var emailStr = email.val();
                            var companyStr = company.val();
                            var plateStr = plate.val();

                            var String = 'name='+ nameStr+'&email='+emailStr+'&company='+companyStr+'&plate='+plateStr;
                            //alert('String: '+String);


                            $.ajax({
                               type: "POST",url: "submit_plate.PHP",data: String,dataType: 'json',cache: false,success: function(returnData){
                                                            alert(returnData.msg);
                                if(returnData.error === falsE) {
                                    **$( this ).dialog( "close" );**
                                }
                                else {
                                    alert("Error: "+returnData.msg);
                                }
                              }

                             });


                    }
                },Cancel: function() {
                    $( this ).dialog( "close" );
                }
            },close: function() {
                allFields.val( "" ).removeClass( "ui-state-error" );
            }
        });

        $( "#submit-plate" )
            //.button()
            .click(function() {
                $( "#dialog-form" ).dialog( "open" );
            });
    });
</script>

有任何想法吗？
EDITED添加PHP代码

<?PHP
include('../cfg/ez_sql.PHP');
include('../cfg/db_setup.PHP');

$err = false;
if (isset($_requEST['plate'])) {

    $raw = "INSERT INTO dot_plate_submissions (plate_code,plate_name,plate_company,plate_email) VALUES ('%s','%s','%s')";
    $clean = sprintf($raw,MysqL_real_escape_String($_requEST['plate']),MysqL_real_escape_String($_requEST['name']),MysqL_real_escape_String($_requEST['company']),MysqL_real_escape_String($_requEST['email']));

    //error_log("cleaned query: $clean");

   $db->query($clean);
}
else {
    $err = true;
}

if($err) {
    $return['error'] = true;
    $return['msg'] = "There was an error submitTing your plate";
}
else {
    $return['error'] = false;
    $return['msg'] = "made it to PHP";
}
echo json_encode($return);
?>

所以即使错误是错误的，ajax调用仍然会收回两个数据。

$.ajax({
    type: "POST",context: $(this),success: function(returnData){
        if(returnData.error === falsE) {
            $( this ).dialog( "close" );
            } else {
                  alert("Error: "+returnData.msg);
            }
    }   
});