源码学习:一个简单的日历控件(2)

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";
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";
calendar.prevYear.onmousedown=function(){
calendar.currentDate[0]--;
calendar.show(calendar.target,calendar.currentDate[0]+"-"+calendar.currentDate[1]+"-"+calendar.currentDate[2],calendar.source);
}
/ Calendar PrevMonth Button ***************/
calendar.prevMonth = calendar.insertTbCell(trRow,1,"<","center");
calendar.prevMonth.title="上一月";
calendar.prevMonth.onmousedown=function(){