jQuery Form Plugin可以很方便的提交form表單。提供了2個函數ajaxForm和ajaxSubmit。
ajaxForm和ajaxSubmit參數是一樣的，兩者之間的區別是： ajaxFormajaxFormform 的設定。ajaxSubmit則會立即提交Form。
可以定義 beforeSubmit 發送ajax提交之前的操作。以及 success 提交後返回內容。
在負載的一些操作中返回數據是json，程序讀寫會方便一些。 以下是提交數據為 json，返回數據也為 json的例子：
function sendSuccess(data, status) {
if(status!=='success') {
alert('Error');
return false;
}
alert(data.message);
}
$('#myForm2').ajaxSubmit({
dataType:'json',
success: sendSuccess
});
以下是官網的一個例子：
// 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, xhr, $form) {
// 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.');
}