jQuery自定义alert,confirm方法及样式

学过JavaScript的都知道，alert()、confirm()都是window对象特有的方法，而这两个方法我们平时使用的频率也很高，但是比较扎心的就是他自带的样式太。。。

因此，我整理了一个比较常用的一个case来替代我们之前使用的alert和confirm

1.js代码（alert.js）

(function($) {        
    $.alerts = {         
        alert: function(title, message, callback) {  
            if( title == null ) title = \'Alert\';  
            $.alerts._show(title, message, null, \'alert\', function(result) {  
                if( callback ) callback(result);  
            });  
        },  
           
        confirm: function(title, message, callback) {  
            if( title == null ) title = \'Confirm\';  
            $.alerts._show(title, message, null, \'confirm\', function(result) {  
                if( callback ) callback(result);  
            });  
        },  
               
          
        _show: function(title, msg, value, type, callback) {  
            
                    var _html = "";  
   
                    _html += \'<div id="mb_box"></div><div id="mb_con"><span id="mb_tit">\' + title + \'</span>\';  
                    _html += \'<div id="mb_msg">\' + msg + \'</div><div id="mb_btnbox">\';  
                      if (type == "alert") {  
                      _html += \'<input id="mb_btn_ok" type="button" value="确定" />\';  
                    }  
                    if (type == "confirm") {  
                      _html += \'<input id="mb_btn_no" type="button" value="取消" />\';  
                      _html += \'<input id="mb_btn_ok" type="button" value="确定" />\';  
                    }  
                    _html += \'</div></div>\';  
                   
                    //必须先将_html添加到body，再设置Css样式  
                    $("body").append(_html); GenerateCss();  
           
            switch( type ) {  
                case \'alert\':  
          
                    $("#mb_btn_ok").click( function() {  
                        $.alerts._hide();  
                        callback(true);  
                    });  
                    $("#mb_btn_ok").focus().keypress( function(e) {  
                        if( e.keyCode == 13 || e.keyCode == 27 ) $("#mb_btn_ok").trigger(\'click\');  
                    });  
                break;  
                case \'confirm\':  
                     
                    $("#mb_btn_ok").click( function() {  
                        $.alerts._hide();  
                        if( callback ) callback(true);  
                    });  
                    $("#mb_btn_no").click( function() {  
                        $.alerts._hide();  
                        if( callback ) callback(false);  
                    });  
                    $("#mb_btn_no").focus();  
                    $("#mb_btn_ok, #mb_btn_no").keypress( function(e) {  
                        if( e.keyCode == 13 ) $("#mb_btn_ok").trigger(\'click\');  
                        if( e.keyCode == 27 ) $("#mb_btn_no").trigger(\'click\');  
                    });  
                break;
            }  
        },  
        _hide: function() {  
             $("#mb_box,#mb_con").remove();  
        }  
    }  
    // Shortuct functions  
    myAlert = function(title, message, callback) {  
        $.alerts.alert(title, message, callback);  
    }  
       
    myConfirm = function(title, message, callback) {  
        $.alerts.confirm(title, message, callback);  
    };  
           
   
      
      //生成Css  
  var GenerateCss = function () {  
   
    $("#mb_box").css({ width: \'100%\', height: \'100%\', zIndex: \'99999\', position: \'fixed\',  
      filter: \'Alpha(opacity=60)\', backgroundColor: \'black\', top: \'0\', left: \'0\', opacity: \'0.6\'  
    });  
   
    $("#mb_con").css({ zIndex: \'999999\', width: \'350px\',height:\'200px\', position: \'fixed\',  
      backgroundColor: \'White\',  
    });  
   
    $("#mb_tit").css({ display: \'block\', fontSize: \'14px\', color: \'#444\', padding: \'10px 15px\',  
      backgroundColor: \'#fff\', borderRadius: \'15px 15px 0 0\',  
      fontWeight: \'bold\'  
    });  
   
    $("#mb_msg").css({ padding: \'20px\', lineHeight: \'40px\', textAlign:\'center\', 
      fontSize: \'18px\' ,color:\'#4c4c4c\' 
    });  
   
    $("#mb_ico").css({ display: \'block\', position: \'absolute\', right: \'10px\', top: \'9px\',  
      border: \'1px solid Gray\', width: \'18px\', height: \'18px\', textAlign: \'center\',  
      lineHeight: \'16px\', cursor: \'pointer\', borderRadius: \'12px\', fontFamily: \'微软雅黑\'  
    });  
   
    $("#mb_btnbox").css({ margin: \'15px 0px 10px 0\', textAlign: \'center\' });  
    $("#mb_btn_ok,#mb_btn_no").css({ width: \'80px\', height: \'30px\', color: \'white\', border: \'none\', borderRadius:\'4px\'});  
    $("#mb_btn_ok").css({ backgroundColor: \'#41a259\' });  
    $("#mb_btn_no").css({ backgroundColor: \'gray\', marginRight: \'40px\' });  
   
   
    //右上角关闭按钮hover样式  
    $("#mb_ico").hover(function () {  
      $(this).css({ backgroundColor: \'Red\', color: \'White\' });  
    }, function () {  
      $(this).css({ backgroundColor: \'#DDD\', color: \'black\' });  
    });  
   
    var _widht = document.documentElement.clientWidth; //屏幕宽  
    var _height = document.documentElement.clientHeight; //屏幕高  
   
    var boxWidth = $("#mb_con").width();  
    var boxHeight = $("#mb_con").height();

//让提示框居中
$("#mb_con").css({left: (_widht - boxWidth) / 2 + "px" });

  
  }  
   
  
})(jQuery); 

2.HTML调用(test.html)

<html>
<head>
    <meta charset="utf-8"/>
    
    <script src="js/jquery.min.js"></script>
    <script src="js/alert.js"></script>
</head>
<body>
<div id="updateDiv" class="display_none">
     <input id="alert" type="button" value="Alert" />  
  <input id="confirm" type="button" value="Confirm" /> 
</div>
</body>
</html>
<script type="text/javascript">    
    $("#alert").bind("click", function () {   
        myAlert(\'系统提示\',\'登录成功！\',function(){   
            //要回调的方法  
            window.location.href="http://www.baidu.com"
        });  
    });  
   
     
    $("#confirm").bind("click", function () {   
        myConfirm(\'系统确认框\',\'登录之后才能查看！\',function(r){  
            if(r){  
                //...点确定之后执行的内容  
                window.location.href="http://www.baidu.com"  
            }  
        });       
    });  
    
    alert("消息提示",1,function(r){if(r){
        
    }});
 
  </script>  

3.效果预览