function atCalendarControl(){
    var calendar=this;
    this.calendarPad=null;
    this.prevMonth=null;
    this.nextMonth=null;
    this.prevYear=null;
    this.nextYear=null;
    this.goToday=null;
    this.calendarClose=null;
    this.calendarAbout=null;
    this.head=null;
    this.body=null;
    this.today=[];
    this.currentDate=[];
    this.sltDate;
    this.target;
    this.source;

    /************** 加入日历底板及阴影 *********************/
    this.addCalendarPad=function(){
     document.write("<div id='divCalendarpad' style='position:absolute;top:100;left:0;width:255;height:187;display:none;'>");
     document.write("<iframe frameborder=0 height=189 width=250></iframe>");
     document.write("<div style='position:absolute;top:2;left:2;width:250;height:187;background-color:#336699;'></div>");
     document.write("</div>");
     calendar.calendarPad=document.all.divCalendarpad;
    }
    /************** 加入日历面板 *********************/
    this.addCalendarBoard=function(){
     var BOARD=this;
     var divBoard=document.createElement("div");
     calendar.calendarPad.insertAdjacentElement("beforeEnd",divBoard);
     divBoard.style.cssText="position:absolute;top:0;left:0;width:250;height:187;border:0 outset;background-color:buttonface;";

     var tbBoard=document.createElement("table");
     divBoard.insertAdjacentElement("beforeEnd",tbBoard);
     tbBoard.style.cssText="position:absolute;top:2;left:2;width:248;height:10;font-size:9pt;";
     tbBoard.cellPadding=0;
     tbBoard.cellSpacing=1;

    /************** 设置各功能按钮的功能 *********************/
     /*********** Calendar About Button ***************/
     trRow = tbBoard.insertRow(0);
     calendar.calendarAbout=calendar.insertTbCell(trRow,0,"-","center");
     calendar.calendarAbout.title="帮助 快捷键:H";
     calendar.calendarAbout.onclick=function(){calendar.about();}
     /*********** Calendar Head ***************/
     tbCell=trRow.insertCell(1);
     tbCell.colSpan=5;
     tbCell.bgColor="#99CCFF";
     tbCell.align="center";
     tbCell.style.cssText = "cursor:default";
     calendar.head=tbCell;
     /*********** Calendar Close Button ***************/
     tbCell=trRow.insertCell(2);
     calendar.calendarClose = calendar.insertTbCell(trRow,2,"x","center");
     calendar.calendarClose.title="关闭 快捷键:ESC或X";
     calendar.calendarClose.onclick=function(){calendar.hide();}

     /*********** Calendar PrevYear Button ***************/
     trRow = tbBoard.insertRow(1);
     calendar.prevYear = calendar.insertTbCell(trRow,0,"<<","center");
     calendar.prevYear.title="上一年 快捷键:↑";
     calendar.prevYear.onmousedown=function(){
      calendar.currentDate[0]--;
      calendar.show(calendar.target,calendar.returnTime,calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(calendar.currentDate[2]),calendar.source);
     }
     /*********** Calendar PrevMonth Button ***************/
     calendar.prevMonth = calendar.insertTbCell(trRow,1,"<","center");
     calendar.prevMonth.title="上一月 快捷键:←";
     calendar.prevMonth.onmousedown=function(){
      calendar.currentDate[1]--;
      if(calendar.currentDate[1]==0){
       calendar.currentDate[1]=12;
       calendar.currentDate[0]--;
      }
      calendar.show(calendar.target,calendar.returnTime,calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(calendar.currentDate[2]),calendar.source);
     }
     /*********** Calendar Today Button ***************/
     calendar.goToday = calendar.insertTbCell(trRow,2,"今天","center",3);
     calendar.goToday.title="选择今天 快捷键:T";
     calendar.goToday.onclick=function(){
       if(calendar.returnTime)  
          calendar.sltDate=calendar.today[0]+"-"+calendar.formatTime(calendar.today[1])+"-"+calendar.formatTime(calendar.today[2])+" "+calendar.formatTime(calendar.today[3])+":"+calendar.formatTime(calendar.today[4])
       else
          calendar.sltDate=calendar.today[0]+"-"+calendar.formatTime(calendar.today[1])+"-"+calendar.formatTime(calendar.today[2]);
      calendar.target.value=calendar.sltDate;
      calendar.hide();
      //calendar.show(calendar.target,calendar.today[0]+"-"+calendar.today[1]+"-"+calendar.today[2],calendar.source);
     }
     /*********** Calendar NextMonth Button ***************/
     calendar.nextMonth = calendar.insertTbCell(trRow,3,">","center");
     calendar.nextMonth.title="下一月 快捷键:→";
     calendar.nextMonth.onmousedown=function(){
      calendar.currentDate[1]++;
      if(calendar.currentDate[1]==13){
       calendar.currentDate[1]=1;
       calendar.currentDate[0]++;
      }
      calendar.show(calendar.target,calendar.returnTime,calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(calendar.currentDate[2]),calendar.source);
     }
     /*********** Calendar NextYear Button ***************/
     calendar.nextYear = calendar.insertTbCell(trRow,4,">>","center");
     calendar.nextYear.title="下一年 快捷键:↓";
     calendar.nextYear.onmousedown=function(){
      calendar.currentDate[0]++;
      calendar.show(calendar.target,calendar.returnTime,calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(calendar.currentDate[2]),calendar.source);

     }

     trRow = tbBoard.insertRow(2);
     var cnDateName = new Array("日","一","二","三","四","五","六");
     for (var i = 0; i < 7; i++) {
      tbCell=trRow.insertCell(i)
      tbCell.innerText=cnDateName[i];
      tbCell.align="center";
      tbCell.width=35;
      tbCell.style.cssText="cursor:default;border:1 solid #99CCCC;background-color:#99CCCC;";
     }

     /*********** Calendar Body ***************/
     trRow = tbBoard.insertRow(3);
     tbCell=trRow.insertCell(0);
     tbCell.colSpan=7;
     tbCell.height=97;
     tbCell.vAlign="top";
     tbCell.bgColor="#F0F0F0";
   
     var tbBody=document.createElement("table");
     tbCell.insertAdjacentElement("beforeEnd",tbBody);
     tbBody.style.cssText="position:relative;top:0;left:0;width:245;height:103;font-size:9pt;"
     tbBody.cellPadding=0;
     tbBody.cellSpacing=1;
     calendar.body=tbBody;
    
     /*********** Time Body ***************/
     trRow = tbBoard.insertRow(4);
     tbCell=trRow.insertCell(0);
     calendar.prevHours = calendar.insertTbCell(trRow,0,"-","center");
     calendar.prevHours.title="小时调整 快捷键:Home";
     calendar.prevHours.onmousedown=function(){
          calendar.currentDate[3]--;
          if(calendar.currentDate[3]==-1) calendar.currentDate[3]=23;
          calendar.bottom.innerText=calendar.formatTime(calendar.currentDate[3])+":"+calendar.formatTime(calendar.currentDate[4]);
      }
     tbCell=trRow.insertCell(1);
     calendar.nextHours = calendar.insertTbCell(trRow,1,"+","center");
     calendar.nextHours.title="小时调整 快捷键:End";
     calendar.nextHours.onmousedown=function(){
          calendar.currentDate[3]++;
          if(calendar.currentDate[3]==24) calendar.currentDate[3]=0;
          calendar.bottom.innerText=calendar.formatTime(calendar.currentDate[3])+":"+calendar.formatTime(calendar.currentDate[4]);
      }
     tbCell=trRow.insertCell(2);
     tbCell.colSpan=3;
     tbCell.bgColor="#99CCFF";
     tbCell.align="center";
     tbCell.style.cssText = "cursor:default";
     calendar.bottom=tbCell;
     tbCell=trRow.insertCell(3);
     calendar.prevMinutes = calendar.insertTbCell(trRow,3,"-","center");
     calendar.prevMinutes.title="分钟调整 快捷键:PageUp";
     calendar.prevMinutes.onmousedown=function(){
          calendar.currentDate[4]--;
          if(calendar.currentDate[4]==-1) calendar.currentDate[4]=59;
          calendar.bottom.innerText=calendar.formatTime(calendar.currentDate[3])+":"+calendar.formatTime(calendar.currentDate[4]);
      }
     tbCell=trRow.insertCell(4);
     calendar.nextMinutes = calendar.insertTbCell(trRow,4,"+","center");
     calendar.nextMinutes.title="分钟调整 快捷键:PageDown";
     calendar.nextMinutes.onmousedown=function(){
          calendar.currentDate[4]++;
          if(calendar.currentDate[4]==60) calendar.currentDate[4]=0;
          calendar.bottom.innerText=calendar.formatTime(calendar.currentDate[3])+":"+calendar.formatTime(calendar.currentDate[4]);
      }

}
  
/************** 加入功能按钮公共样式 *********************/
    this.insertTbCell=function(trRow,cellIndex,TXT,trAlign,tbColSpan){
     var tbCell=trRow.insertCell(cellIndex);
     if(tbColSpan!=undefined) tbCell.colSpan=tbColSpan;

     var btnCell=document.createElement("button");
     tbCell.insertAdjacentElement("beforeEnd",btnCell);
     btnCell.value=TXT;
     btnCell.style.cssText="width:100%;border:1 outset;background-color:buttonface;";
     btnCell.onmouseover=function(){
     btnCell.style.cssText="width:100%;border:1 outset;background-color:#F0F0F0;";

     }
     btnCell.onmouseout=function(){
      btnCell.style.cssText="width:100%;border:1 outset;background-color:buttonface;";
     }
    // btnCell.onmousedown=function(){
    //    btnCell.style.cssText="width:100%;border:1 inset;background-color:#F0F0F0;";
    // }
     btnCell.onmouseup=function(){
      btnCell.style.cssText="width:100%;border:1 outset;background-color:#F0F0F0;";
     }
     btnCell.onclick=function(){
      btnCell.blur();
     }
     return btnCell;
    }
  
    this.setDefaultDate=function(){
     var dftDate=new Date();
     calendar.today[0]=dftDate.getYear();
     calendar.today[1]=dftDate.getMonth()+1;
     calendar.today[2]=dftDate.getDate();
     calendar.today[3]=dftDate.getHours();
     calendar.today[4]=dftDate.getMinutes();
    }

    /****************** Show Calendar *********************/
    this.show=function(targetObject,returnTime,defaultDate,sourceObject){
     if(targetObject==undefined) {
      alert("未设置目标对象. \n方法: ATCALENDAR.show(obj 目标对象,boolean 是否返回时间,string 默认日期,obj 点击对象);\n\n目标对象:接受日期返回值的对象.\n默认日期:格式为\"yyyy-mm-dd\",缺省为当前日期.\n点击对象:点击这个对象弹出calendar,默认为目标对象.\n");
      return false;
     }
     else calendar.target=targetObject;
   
     if(sourceObject==undefined) calendar.source=calendar.target;
     else calendar.source=sourceObject;

     if(returnTime) calendar.returnTime=true;
     else calendar.returnTime=false;

     var firstDay;
     var Cells=new Array();
     if((defaultDate==undefined) || (defaultDate=="")){
      var theDate=new Array();
      calendar.head.innerText = calendar.today[0]+"-"+calendar.formatTime(calendar.today[1])+"-"+calendar.formatTime(calendar.today[2]);
      calendar.bottom.innerText = calendar.formatTime(calendar.today[3])+":"+calendar.formatTime(calendar.today[4]);
    
      theDate[0]=calendar.today[0]; theDate[1]=calendar.today[1]; theDate[2]=calendar.today[2];
      theDate[3]=calendar.today[3]; theDate[4]=calendar.today[4];
     }
     else{
      var Datereg=/^\d{4}-\d{1,2}-\d{2}$/
      var DateTimereg=/^(\d{1,4})-(\d{1,2})-(\d{1,2}) (\d{1,2}):(\d{1,2})$/
      if((!defaultDate.match(Datereg)) && (!defaultDate.match(DateTimereg))){
       alert("默认日期(时间)的格式不正确！\t\n\n默认可接受格式为:\n1、yyyy-mm-dd \n2、yyyy-mm-dd hh:mm\n3、(空)");
       calendar.setDefaultDate();
       return;
      }
    
      if(defaultDate.match(Datereg)) defaultDate=defaultDate+" "+calendar.today[3]+":"+calendar.today[4];
      var strDateTime=defaultDate.match(DateTimereg);
      var theDate=new Array(4)
      theDate[0]=strDateTime[1];
      theDate[1]=strDateTime[2];
      theDate[2]=strDateTime[3];
      theDate[3]=strDateTime[4];
      theDate[4]=strDateTime[5];
      calendar.head.innerText = theDate[0]+"-"+calendar.formatTime(theDate[1])+"-"+calendar.formatTime(theDate[2]);
      calendar.bottom.innerText = calendar.formatTime(theDate[3])+":"+calendar.formatTime(theDate[4]);
      }
     calendar.currentDate[0]=theDate[0];
     calendar.currentDate[1]=theDate[1];
     calendar.currentDate[2]=theDate[2];
     calendar.currentDate[3]=theDate[3];
     calendar.currentDate[4]=theDate[4];
   
     theFirstDay=calendar.getFirstDay(theDate[0],theDate[1]);
     theMonthLen=theFirstDay+calendar.getMonthLen(theDate[0],theDate[1]);
     //calendar.setEventKey();

     calendar.calendarPad.style.display="";
     var theRows = Math.ceil((theMonthLen)/7);
     //清除旧的日历;
     while (calendar.body.rows.length > 0) {
      calendar.body.deleteRow(0)
     }
     //建立新的日历;
     var n=0;day=0;
     for(i=0;i<theRows;i++){
      theRow=calendar.body.insertRow(i);
      for(j=0;j<7;j++){
       n++;
       if(n>theFirstDay && n<=theMonthLen){
        day=n-theFirstDay;
        calendar.insertBodyCell(theRow,j,day);
       }

       else{
        var theCell=theRow.insertCell(j);
        theCell.style.cssText="background-color:#F0F0F0;cursor:default;";
       }
      }
     }

     //****************调整日历位置**************//
     var offsetPos=calendar.getAbsolutePos(calendar.source);//计算对象的位置;
     if((document.body.offsetHeight-(offsetPos.y+calendar.source.offsetHeight-document.body.scrollTop))<calendar.calendarPad.style.pixelHeight){
      var calTop=offsetPos.y-calendar.calendarPad.style.pixelHeight;
     }
     else{
      var calTop=offsetPos.y+calendar.source.offsetHeight;
     }
     if((document.body.offsetWidth-(offsetPos.x+calendar.source.offsetWidth-document.body.scrollLeft))>calendar.calendarPad.style.pixelWidth){
      var calLeft=offsetPos.x;
     }
     else{
      var calLeft=calendar.source.offsetLeft+calendar.source.offsetWidth;
     }
     //alert(offsetPos.x);
     calendar.calendarPad.style.pixelLeft=calLeft;
     calendar.calendarPad.style.pixelTop=calTop;
    }
    /****************** 计算对象的位置 *************************/
    this.getAbsolutePos = function(el) {
     var r = { x: el.offsetLeft, y: el.offsetTop };
     if (el.offsetParent) {
      var tmp = calendar.getAbsolutePos(el.offsetParent);
      r.x += tmp.x;
      r.y += tmp.y;
     }
     return r;
    };

    //************* 插入日期单元格 **************/
    this.insertBodyCell=function(theRow,j,day,targetObject){
     var theCell=theRow.insertCell(j);
     if(j==0) var theBgColor="#FF9999";
     else var theBgColor="#FFFFFF";
     if(day==calendar.currentDate[2]) var theBgColor="#CCCCCC";
     if(day==calendar.today[2]) var theBgColor="#99FFCC";
     theCell.bgColor=theBgColor;
     theCell.innerText=day;
     theCell.align="center";
     theCell.width=35;
     theCell.style.cssText="border:1 solid #CCCCCC;cursor:hand;";
     theCell.onmouseover=function(){ 
      theCell.bgColor="#FFFFCC"; 
      theCell.style.cssText="border:1 outset;cursor:hand;";
     }
     theCell.onmouseout=function(){ 
      theCell.bgColor=theBgColor; 
      theCell.style.cssText="border:1 solid #CCCCCC;cursor:hand;";
     }
     theCell.onmousedown=function(){ 
      theCell.bgColor="#FFFFCC"; 
      theCell.style.cssText="border:1 inset;cursor:hand;";
     }
     theCell.onclick=function(){
       if(calendar.returnTime)  
          calendar.sltDate=calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(day)+" "+calendar.formatTime(calendar.currentDate[3])+":"+calendar.formatTime(calendar.currentDate[4])
       else
          calendar.sltDate=calendar.currentDate[0]+"-"+calendar.formatTime(calendar.currentDate[1])+"-"+calendar.formatTime(day);
      calendar.target.value=calendar.sltDate;
      calendar.hide();
     }
    }
    /************** 取得月份的第一天为星期几 *********************/
    this.getFirstDay=function(theYear, theMonth){
     var firstDate = new Date(theYear,theMonth-1,1);
     return firstDate.getDay();
    }
    /************** 取得月份共有几天 *********************/

    this.getMonthLen=function(theYear, theMonth) {
     theMonth--;
     var oneDay = 1000 * 60 * 60 * 24;
     var thisMonth = new Date(theYear, theMonth, 1);
     var nextMonth = new Date(theYear, theMonth + 1, 1);
     var len = Math.ceil((nextMonth.getTime() - thisMonth.getTime())/oneDay);
     return len;
    }
    /************** 隐藏日历 *********************/
    this.hide=function(){
     //calendar.clearEventKey();
     calendar.calendarPad.style.display="none";
   
    }
    /************** 从这里开始 *********************/
    this.setup=function(defaultDate){
     calendar.addCalendarPad();
     calendar.addCalendarBoard();
     calendar.setDefaultDate();
    }
    /************** 格式化时间 *********************/
this.formatTime = function(str) {
    str = ("00"+str);
    return str.substr(str.length-2);
}

/************** 关于AgetimeCalendar *********************/
    this.about=function(){
     var strAbout = "\nWeb 日历选择输入控件操作说明:\n\n";
     strAbout+="-\t: 关于\n";
     strAbout+="x\t: 隐藏\n";
     strAbout+="<<\t: 上一年\n";
     strAbout+="<\t: 上一月\n";

     strAbout+="今日\t: 返回当天日期\n";
     strAbout+=">\t: 下一月\n";
     strAbout+="<<\t: 下一年\n";
     strAbout+="\nWeb日历选择输入控件\tVer:v1.0\t\nDesigned By:wxb \t\t2004.11.22\t\n";
     alert(strAbout);
    }
  
document.onkeydown=function(){
      if(calendar.calendarPad.style.display=="none"){
          window.event.returnValue= true;
          return true ;
      }
      switch(window.event.keyCode){
          case 27 : calendar.hide(); break; //ESC
          case 37 : calendar.prevMonth.onmousedown(); break;//←
          case 38 : calendar.prevYear.onmousedown();break; //↑
          case 39 : calendar.nextMonth.onmousedown(); break;//→
          case 40 : calendar.nextYear.onmousedown(); break;//↓
          case 84 : calendar.goToday.onclick(); break;//T
          case 88 : calendar.hide(); break;     //X
          case 72 : calendar.about(); break;     //H    
          case 36 : calendar.prevHours.onmousedown(); break;//Home
          case 35 : calendar.nextHours.onmousedown(); break;//End
          case 33 : calendar.prevMinutes.onmousedown();break; //PageUp
          case 34 : calendar.nextMinutes.onmousedown(); break;//PageDown
          } 
          window.event.keyCode = 0;
          window.event.returnValue= false;
          }

    calendar.setup();
}
  
var CalendarWebControl = new atCalendarControl();