重写alert，confirm 提示框样式

1.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_ok" type="button" value="确定" />";
                      _html += "<input id="mb_btn_no" type="button" value="取消" />";
                    }
                    _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
    zdalert = function(title, message, callback) {
        $.alerts.alert(title, message, callback);
    }
     
    zdconfirm = 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: "50%", position: "fixed",
      backgroundColor: "White", borderRadius: "15px"
    });
 
    $("#mb_tit").css({ display: "block", fontSize: "14px", color: "#444", padding: "10px 15px",
      backgroundColor: "#DDD", borderRadius: "15px 15px 0 0",
      borderBottom: "3px solid #009BFE", fontWeight: "bold"
    });
 
    $("#mb_msg").css({ padding: "20px", lineHeight: "20px",
      borderBottom: "1px dashed #DDD", fontSize: "13px"
    });
 
    $("#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 0 10px 0", textAlign: "center" });
    $("#mb_btn_ok,#mb_btn_no").css({ width: "85px", height: "30px", color: "white", border: "none" });
    $("#mb_btn_ok").css({ backgroundColor: "#168bbb" });
    $("#mb_btn_no").css({ backgroundColor: "gray", marginLeft: "20px" });
 
 
    //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({ top: (_height - boxHeight) / 2 + "px", left: (_widht - boxWidth) / 2 + "px" });
  }
 

})(jQuery);

2.调用例子

<!doctype html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>模拟alert和confirm提示框</title>
</head>
<body>
  <input id="add" type="button" value="添加" />
  <input id="update" type="button" value="修改" />
 
<script src="wei-js/jquery-1.10.1.min.js" type="text/javascript"></script>
<script src="wei-js/myalert.js" type="text/javascript"></script>
  <script type="text/javascript">
 
    $("#add").bind("click", function () {
      // $.MsgBox.Alert("消息", "哈哈，添加成功！");

         zdalert("系统提示","请输入正确数值",function(){ 
         
         //要回调的方法
          window.location.href="http://www.baidu.com"});
     
    });
 
   
    //也可以传方法名 test
    $("#update").bind("click", function () {


      // $.MsgBox.Confirm("温馨提示", "确定要进行修改吗？", test);
      
      zdconfirm("系统确认框","你确认提交该条数据吗",function(r){
     if(r)
      {
         //...点确定之后执行的内容
         
         window.location.href="http://www.baidu.com"
      }
    });     
      

    });
 

  </script>
</body>
</html>