JQuery-Form中的AjaxForm和AjaxSubmit的区别
JQuery中的AjaxForm和AjaxSubmit使用差不多功能也差不多。很容易误解。
按照作者的解释：
AjaxForm
ajaxForm不能提交表单。在document的ready函数中，使用ajaxForm来为AJAX提交表单进行准备。提交动作必须由submit开始
ajaxSubmit
马上由AJAX来提交表单。你可以在任何情况下进行该项提交。
option的参数

// prepare the form when the DOM is ready $(document).ready(function() {     var options = {         target:        '#output2',   // target element(s) to be updated with server response         beforeSubmit:  showRequest,  // pre-submit callback         success:       showResponse  // post-submit callback          // other available options:         //url:       url         // override for form's 'action' attribute         //type:      type        // 'get' or 'post', override for form's 'method' attribute         //dataType:  null        // 'xml', 'script', or 'json' (expected server response type)         //clearForm: true        // clear all form fields after successful submit         //resetForm: true        // reset the form after successful submit          // $.ajax options can be used here too, for example:         //timeout:   3000     };      // bind to the form's submit event     $('#myForm2').submit(function() {         // inside event callbacks 'this' is the DOM element so we first         // wrap it in a jQuery object and then invoke ajaxSubmit         $(this).ajaxSubmit(options);          // !!! Important !!!         // always return false to prevent standard browser submit and page navigation         return false;     }); });  // pre-submit callback function showRequest(formData, jqForm, options) {     // formData is an array; here we use $.param to convert it to a string to display it     // but the form plugin does this for you automatically when it submits the data     var queryString = $.param(formData);      // jqForm is a jQuery object encapsulating the form element.  To access the     // DOM element for the form do this:     // var formElement = jqForm[0];      alert('About to submit: \n\n' + queryString);      // here we could return false to prevent the form from being submitted;     // returning anything other than false will allow the form submit to continue     return true; }  // post-submit callback function showResponse(responseText, statusText)  {     // for normal html responses, the first argument to the success callback     // is the XMLHttpRequest object's responseText property      // if the ajaxSubmit method was passed an Options Object with the dataType     // property set to 'xml' then the first argument to the success callback     // is the XMLHttpRequest object's responseXML property      // if the ajaxSubmit method was passed an Options Object with the dataType     // property set to 'json' then the first argument to the success callback     // is the json data object returned by the server      alert('status: ' + statusText + '\n\nresponseText: \n' + responseText +         '\n\nThe output div should have already been updated with the responseText.'); }