(function ($) {'use strict';window.alert = $.alert = function (msg) {var defaultOpts = {bodyClass: 'body-cover',mainClass: 'main-cover',alertClass: 'alert-cover'};var _body = $('body');//bodyvar _wrap = $('<div></div>');//遮挡层var _coverCotent = $('<div><div class="alert-close"><i class="fa fa-close"></i></div><div class="content"></div></div>');_body.addClass(defaultOpts.bodyClass); //设置body效果_body.append(_wrap);//添加遮挡层_wrap.addClass(defaultOpts.mainClass);//遮挡层添加样式_body.append(_coverCotent);//添加遮挡内容层_coverCotent.addClass(defaultOpts.alertClass);////添加遮挡内容层样式_coverCotent.find('.content').text(msg);_coverCotent.fadeIn('500');//点击遮挡层_wrap.unbind().bind('click', function () {_close();});//点击关闭按钮$(_coverCotent.find('i')).unbind().bind('click', function () {_close();});var _close = function () {_coverCotent.fadeOut('300', function () {_body.removeClass(defaultOpts.bodyClass);//移除bodycover样式_wrap.remove();//遮挡层移除_coverCotent.remove();//遮挡内容层移除
            });            }//定时销毁setTimeout(_close, 10000);}})(jQuery);

/*  cover body style */
.body-cover{overflow: hidden;}/*  wrap style */
.main-cover{position: fixed;top: 0;bottom: 0;left: 0;right: 0;background-color: #000;opacity: 0.8; filter: alpha(opacity=80);}/*  cover content style */
.alert-cover{position: fixed; z-index:99999; width:400px;min-height: 120px;top: 50%; left: 50%; margin-top: -80px; border-radius: 6px;margin-left: -200px;border: 1px solid #eee;box-shadow: 0 1px 10px 0 rgba(0, 0, 0, 0.5);background-color: white;display: none;}
.alert-cover .alert-close{height: 30px; text-align: right;cursor: pointer;padding-right: 10px;}
.alert-cover .content{text-align: center;}