jquery模拟alert的弹窗插件

$.alert('your message');$.alert('your message',function(){ $.alert('click ok button')});$.confirm('your message');$.confirm('your message',function(result){ if(result){  $.alert('click ok button') }else{  $.alert('click cancel button') }})

(function ($) {  $.extend({    _isalert:0,    alert:function(){      if(arguments.length){        $._isalert=1;        $.confirm.apply($,arguments);      }    },    confirm:function(){      var args=arguments;      if(args.length&&(typeof args[0] == 'string')&&!$('#alert_overlay').length){        if(!$('#alert_style').length) $('body').append('<style id="alert_style" type="text/css">#alert_overlay{position:fixed;width:100%;height:100%;top:0;left:0;z-index:999;background:#000;filter:alpha(opacity=5);opacity:.05}#alert_msg{position:fixed;width:400px;margin-left:-201px;left:50%;top:20%;z-index:1000;border:1px solid #aaa;box-shadow:0 2px 15px rgba(0,0,0,.3);background:#fff}#alert_content{padding:20px;font-size:14px;text-align:left}#alert_buttons{padding:10px;border-top:1px solid #aaa;text-align:right;box-shadow:0 1px 0 #fff inset;background:#eee;-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none}#alert_buttons .alert_btn{padding:5px 12px;margin:0 2px;border:1px solid #aaa;background:#eee;cursor:pointer;border-radius:2px;font-size:14px;outline:0;-webkit-appearance:none}#alert_buttons .alert_btn:hover{border-color:#bbb;box-shadow:0 1px 2px #aaa;background:#eaeaea}#alert_buttons .alert_btn:active{box-shadow:0 1px 2px #aaa inset;background:#e6e6e6}</style>');        var dialog=$('<div id="alert_overlay"></div><div id="alert_msg"><div id="alert_content">'+args[0]+'</div><div id="alert_buttons"><button class="alert_btn alert_btn_ok">确定</button><button class="alert_btn alert_btn_cancel">取消</button></div></div>');        if($._isalert) dialog.find('.alert_btn_cancel').hide();        dialog.on('contextmenu',function(){          return !1;        }).on('click','.alert_btn_ok',function(){          dialog.remove();          if(typeof args[1]=='function') args[1].call($,!0);        }).on('click','.alert_btn_cancel',function(){          dialog.remove();          if(typeof args[1]=='function') args[1].call($,!1);        }).appendTo('body');      }      $._isalert=0;    }  });})($);