#my_alert{line-height: 100px; color: #fff; background: #333; text-align: center; font-size: 20px;}

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// jQuery插件开发demo

(function ($) {

// 基本配置

var dft = {

    wd:"200px",//宽

    hei:"100px",//高

    cont:"成功",//内容

    time:200//时间

};

// 入口方法

function my_alert(options){

    this.ops = $.extend({},dft,options||{});

    this.vis="v2.0.0";

    this.init();

}

my_alert.prototype={

    init:function(){

        var ops=this.ops;

        var box = $(‘<div id="my_alert">‘).css({"width":ops.wd, "height":"100px","position":"fixed","left":"50%","top":"50%"}).html(ops.cont).appendTo($("body"));

      box.css({"margin-left":-(box.outerWidth(true)/2),"margin-top":-box.outerHeight(true)/2});

      setTimeout(function(){

          box.remove();

      },ops.time);

    }

};

$.fn.my_alert = function(options) {

    return new my_alert(options);

}

})(jQuery);

$("body").my_alert({"cont":"睡毛线，起来嗨","time":2000});