ajaxUrl is not defined

当我按下绿色按钮时http://jazzkredit.ru/在提交表单后，我收到了消息"ajaxUrl未定义"，而不是应该弹出的图像和我应该在电子邮件中收到的电子邮件。

有人能帮我解决这个问题吗？我试着在谷歌和Stackoverflow上搜索答案，但没有帮助。

var formData = new FormData($('form#loanappform')[0]);
$.ajax({
    url: ajaxUrl,  //Server script to process data
    type: 'POST',
    xhr: function() {  // Custom XMLHttpRequest
        var myXhr = $.ajaxSettings.xhr();
        if(myXhr.upload){ // Check if upload property exists
            myXhr.upload.addEventListener('progress',progressHandlingFunction, false); // For handling the progress of the upload
        }
        return myXhr;
    },
    //Ajax events
    success: completeHandler,
    // Form data
    data: formData,
    //Options to tell jQuery not to process data or worry about content-type.
    cache: false,
    contentType: false,
    processData: false
});