在原型中,我可以用下面的代码显示“加载…”图像:

var myAjax = new Ajax.Request( url, {method: 'get', parameters: pars, 
onLoading: showLoad, onComplete: showResponse} );

function showLoad () {
    ...
}

在jQuery中,我可以将服务器页面加载到一个元素中:

$('#message').load('index.php?pg=ajaxFlashcard');

但是我如何附加一个加载旋转到这个命令,因为我在原型?


当前回答

$('#message').load('index.php?pg=ajaxFlashcard', null, showResponse);
showLoad();

function showResponse() {
    hideLoad();
    ...
}

http://docs.jquery.com/Ajax/load#urldatacallback

其他回答

$('#loading-image').html('<img src="/images/ajax-loader.gif"> Sending...');

        $.ajax({
            url:  uri,
            cache: false,
            success: function(){
                $('#loading-image').html('');           
            },

           error:   function(jqXHR, textStatus, errorThrown) {
            var text =  "Error has occured when submitting the job: "+jqXHR.status+ " Contact IT dept";
           $('#loading-image').html('<span style="color:red">'+text +'  </span>');

            }
        });

如果你不想自己写代码,也有很多插件可以做到这一点:

https://github.com/keithhackbarth/jquery-loading http://plugins.jquery.com/project/loading

使用加载插件:http://plugins.jquery.com/project/loading

$.loading.onAjax({img:'loading.gif'});

JavaScript

$.listen('click', '#captcha', function() {
    $('#captcha-block').html('<div id="loading" style="width: 70px; height: 40px; display: inline-block;" />');
    $.get("/captcha/new", null, function(data) {
        $('#captcha-block').html(data);
    }); 
    return false;
});

CSS

#loading { background: url(/image/loading.gif) no-repeat center; }
<script>
                $(window).on('beforeunload', function (e) {
                    $("#loader").show();
                });
                $(document).ready(function () {
                    $(window).load(function () {
                        $("#loader").hide();
                    });
                });
            </script>

<div id="loader">
                    <img src="../images/loader.png" 
                         style="width:90px;">
                </div>