日历出错问题

Question

/****************** Show Calendar *********************/
  this.show=function(targetObject,defaultDate,sourceObject){
   if(targetObject==undefined) {
    alert("未设置目标对像. \n方法: ATCALENDAR.show(obj 目标对像,string 默认日期,obj 点击对像);\n\n目标对像:接受日期返回值的对像.\n默认日期:格式为\"yyyy-mm-dd\",缺省为当日日期.\n点击对像:点击这个对像弹出calendar,默认为目标对像.\n");
    return false;
   }
   else    calendar.target=targetObject;
   if(sourceObject==undefined) calendar.source=calendar.target;
   else calendar.source=sourceObject;   var firstDay;
   var Cells=new Array();
   if(defaultDate==undefined || defaultDate==""){
    var theDate=new Array();
    calendar.head.innerText = calendar.today[0]+"-"+calendar.today[1]+"-"+calendar.today[2];
    theDate[0]=calendar.today[0]; theDate[1]=calendar.today[1]; theDate[2]=calendar.today[2];
   }
   else{
    var reg=/^\d{4}-\d{1,2}-\d{2}$/
    if(!defaultDate.match(reg)){
     alert("默认日期的格式不正确\n\n默认日期可接受格式为:'yyyy-mm-dd'");
     return;
    }
    var theDate=defaultDate.split("-");
    calendar.head.innerText = defaultDate;
   }
   calendar.currentDate[0]=theDate[0];
   calendar.currentDate[1]=theDate[1];
   calendar.currentDate[2]=theDate[2];
   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);//计算对像的位置;
   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;
  }
  /****************** 计算对像的位置 *************************/
  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.currentDate[1].length<2) calendar.currentDate[1]="0"+calendar.currentDate[1];
    if(day.toString().length<2) day="0"+day;
    calendar.sltDate=calendar.currentDate[0]+"-"+calendar.currentDate[1]+"-"+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();
  }
  /************** 关于AgetimeCalendar *********************/
  this.about=function(){
   /*//alert("Agetime Calendar V1.0\n\nwww.agetime.com\n");
   popLeft = calendar.calendarPad.style.pixelLeft+4;
   popTop = calendar.calendarPad.style.pixelTop+25;
   var popup = window.createPopup();
   var popupBody = popup.document.body;
   popupBody.style.cssText="border:solid 2 outset;font-size:9pt;background-color:#F0F0F0;";
   var popHtml = "<span style='color:#336699;font-size:12pt;'><U>关于 AgetimeCalendar</U></span><BR><BR>";
   popHtml+="版本: v1.0<BR>日期: 2004-03-13";
   popupBody.innerHTML=popHtml;
   popup.show(popLeft,popTop,240,136,document.body); */
   var strAbout = "About AgetimeCalendar\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+="\nAgetimeCalendar\nVersion:v1.0\nDesigned By:暂停打印 2004-03-16  [email protected] \n";
   alert(strAbout);
  }  calendar.setup();
 }