加载动画插件

$.loading = function (show, content) {
    var _loadingToast =
        '<div id="loadingToast">'
        + '<div class="weui-mask_transparent"></div>'
        + '<div class="weui-toast">'
        + '<i class="weui-loading weui-icon_toast"></i>'
        + '<p id="loadingToast_content" class="weui-toast__content"></p>'
        + '</div>'
        + '</div>';
    if (show) {
        $(document.body).append(_loadingToast);
        if (!!content) {
            $("#loadingToast_content").html(content);
        } else {
            $("#loadingToast_content").html("数据加载中");
        }
    } else {
        $("#loadingToast").remove();
    }
}