源码学习:一个简单的日历控件

calendar.js

   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:167;display:none;'>");
   document.write("<iframe frameborder=0 height=168 width=255></iframe>");
   document.write("<div style='position:absolute;top:4;left:4;width:248;height:164;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:166;border:1 outset;background-color:buttonface;";

   var tbBoard=document.createElement("table");
   divBoard.insertAdjacentElement("beforeEnd",tbBoard);
   tbBoard.style.cssText="position:absolute;top:0;left:0;width:100%;height:10;font-size:9pt;";
   tbBoard.cellPadding=0;
   tbBoard.cellSpacing=1;
   tbBoard.bgColor="#333333";

  /************** 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.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";

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