比较好用的日期控件

/********************************************************* 
* 使用方法 
* 控件调用onclick="fPopCalendar(event,this,this)" 
* 如下，给控件设置为readonly 
* <input type="text" style="border:1px solid #cccccc;" 
* size="15" onclick="fPopCalendar(event,this,this)" 
* onfocus="this.select()" readonly="readonly" /> 
* 
* 如果页面乱码，把下面包含汉字的定义项放到页面中即可 
********************************************************/ 
var gMonths=new Array("一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"); 
var WeekDay=new Array("日","一","二","三","四","五","六"); 
var strToday="今天"; 
var strYear="年"; 
var strMonth="月"; 
var strDay="日"; 
var splitChar="-"; 
var startYear=2000; 
var endYear=2050; 
var dayTdHeight=12; 
var dayTdTextSize=12; 
var gcNotCurMonth="#E0E0E0"; 
var gcRestDay="#FF0000"; 
var gcWorkDay="#444444"; 
var gcWeekDay="#990099"; 
var gcMouseOver="#79D0FF"; 
var gcMouseOut="#F4F4F4"; 
var gcToday="#444444"; 
var gcTodayMouseOver="#6699FF"; 
var gcTodayMouseOut="#CCCCFF"; 
var gdCtrl=new Object(); 
var goSelectTag=new Array(); 
var gdCurDate=new Date(); 
var giYear=curYear=gdCurDate.getFullYear(); 
var giMonth=curMonth=gdCurDate.getMonth()+1; 
var giDay=curDay=gdCurDate.getDate(); 
function $(){var elements=new Array();for(var i=0;i<arguments.length;i++) {var element=arguments[i];if(typeof(arguments[i])=='string'){element=document.getElementById(arguments[i]);}if(arguments.length==1){return element;}elements.Push(element);}return elements;} 
Array.prototype.Push=function(){var startLength=this.length;for(var i=0;i<arguments.length;i++){this[startLength+i]=arguments[i];}return this.length;} 
String.prototype.HexToDec=function(){return parseInt(this,16);} 
String.prototype.cleanBlank=function(){return this.isEmpty()?"":this.replace(/\s/g,"");} 
function checkColor(){var color_tmp=(arguments[0]+"").replace(/\s/g,"").toUpperCase();var model_tmp1=arguments[1].toUpperCase();var model_tmp2="rgb("+arguments[1].substring(1,3).HexToDec()+","+arguments[1].substring(1,3).HexToDec()+","+arguments[1].substring(5).HexToDec()+")";model_tmp2=model_tmp2.toUpperCase();if(color_tmp==model_tmp1 ||color_tmp==model_tmp2){return true;}return false;} 
function $V(){return $(arguments[0]).value;} 
function fPopCalendar(evt,popCtrl,dateCtrl){evt.cancelBubble=true;gdCtrl=dateCtrl;var evtDate="";if(document.all){evtDate=evt.srcElement.value;}else{evtDate=evt.currentTarget.value;}var reg=/(^\d{4})\-([0-1]\d)\-([0-2]\d$)/;if(reg.test(evtDate)){reg.exec();giYear=RegExp.$1;giMonth=RegExp.$2;giDay=RegExp.$3;}fSetYearMon(giYear,giMonth);var point=fGetXY(popCtrl);with($("calendardiv").style){left=point.x+"px";top=(point.y+popCtrl.offsetHeight+1)+"px";visibility='visible';zindex='99';position='absolute';}$("calendardiv").focus();} 
function fSetDate(iYear,iMonth,iDay){var iMonthNew=new String(iMonth);var iDayNew=new String(iDay);if(iMonthNew.length<2){iMonthNew="0"+iMonthNew;}if(iDayNew.length<2){iDayNew="0"+iDayNew;}gdCtrl.value=iYear+splitChar+iMonthNew+splitChar+iDayNew;fHideCalendar();} 
function fHideCalendar(){$("calendardiv").style.visibility="hidden";for(var i=0;i<goSelectTag.length;i++){goSelectTag[i].style.visibility="visible";}goSelectTag.length=0;} 
function fSetSelected(){var iOffset=0;var iYear=parseInt($("tbSelYear").value);var iMonth=parseInt($("tbSelMonth").value);var aCell=$("cellText"+arguments[0]);with(aCell){var iDay=parseInt(innerHTML);if(checkColor(style.color,gcNotCurMonth)){iOffset=(innerHTML>10)?-1:1;}iMonth+=iOffset;if(iMonth<1){iYear--;iMonth=12;}else if(iMonth>12){iYear++;iMonth=1;}}fSetDate(iYear,iMonth,iDay);} 
function Point(iX,iY){this.x=iX;this.y=iY;} 
function fBuildCal(iYear,iMonth){var aMonth=new Array();for(var i=1;i<7;i++){aMonth[i]=new Array(i);}var dCalDate=new Date(iYear,iMonth-1,1);var iDayOfFirst=dCalDate.getDay();var iDaysInMonth=new Date(iYear,iMonth,0).getDate();var iOffsetLast=new Date(iYear,iMonth-1,0).getDate()-iDayOfFirst+1;var iDate=1;var iNext=1;for(var d=0;d<7;d++){aMonth[1][d]=(d<iDayOfFirst)?(iOffsetLast+d)*(-1):iDate++;}for(var w=2;w<7;w++){for(var d=0;d<7;d++){aMonth[w][d]=(iDate<=iDaysInMonth)?iDate++:(iNext++)*(-1);}}return aMonth;} 
function fDrawCal(iYear,iMonth,iCellHeight,iDateTextSize){var colorTD="background-color:"+gcMouseOut+";border-color:"+gcMouseOut+";";var styleTD="height:"+iCellHeight+"px;font-weight:bolder;font-size:"+iDateTextSize+"px;vertical-align:middle; text-align:center;";var dateCal="";dateCal+="<tr>";for(var i=0;i<7;i++){dateCal+="<td style='"+colorTD+styleTD+"color:"+gcWeekDay+";'>"+WeekDay[i]+"</td>";}dateCal+="</tr>";for(var w=1;w<7;w++){dateCal+="<tr>";for(var d=0;d<7;d++){var tmpid=w+""+d;dateCal+="<td style='"+styleTD+"cursor:pointer;' onclick='fSetSelected("+tmpid+")'>";dateCal+="<span id='cellText"+tmpid+"'></span>";dateCal+="</td>";}dateCal+="</tr>";}return dateCal;} 
function fUpdateCal(iYear,iMonth){var myMonth=fBuildCal(iYear,iMonth);var i=0;for(var w=1;w<7;w++){for(var d=0;d<7;d++){with($("cellText"+w+""+d)){parentNode.style.backgroundColor=gcMouseOut;parentNode.style.borderColor=gcMouseOut;parentNode.onmouseover=function(){this.style.backgroundColor=gcMouseOver;};parentNode.onmouseout=function(){this.style.backgroundColor=gcMouseOut;};if(myMonth[w][d]<0){style.color=gcNotCurMonth;innerHTML=Math.abs(myMonth[w][d]);}else{style.color=((d==0)||(d==6))?gcRestDay:gcWorkDay;innerHTML=myMonth[w][d];if(iYear==giYear && iMonth==giMonth && myMonth[w][d]==giDay){parentNode.style.backgroundColor=gcMouseOver;parentNode.onmouseover=function(){this.style.backgroundColor=gcMouseOver;};parentNode.onmouseout=function(){this.style.backgroundColor=gcMouseOver;};}if(iYear==curYear && iMonth==curMonth && myMonth[w][d]==curDay){style.color=gcToday;parentNode.style.backgroundColor=gcTodayMouseOut;parentNode.onmouseover=function(){this.style.backgroundColor=gcTodayMouseOver;};parentNode.onmouseout=function(){this.style.backgroundColor=gcTodayMouseOut;};}}}}}} 
function fCurrentDate(){return curYear+strYear+curMonth+strMonth+curDay+strDay;} 
function fSetYearMon(iYear,iMon){$("tbSelMonth").options[iMon-1].selected=true;for(var i=0;i<$("tbSelYear").length;i++){if($("tbSelYear").options[i].value==iYear){$("tbSelYear").options[i].selected=true;}}fUpdateCal(iYear,iMon);} 
function fPrevMonth(){var iMon=$("tbSelMonth").value;var iYear=$("tbSelYear").value;if(--iMon<1){iMon=12;iYear--;}fSetYearMon(iYear,iMon);} 
function fNextMonth(){var iMon=$("tbSelMonth").value;var iYear=$("tbSelYear").value;if(++iMon>12){iMon=1;iYear++;}fSetYearMon(iYear,iMon);} 
function fGetXY(aTag){var oTmp=aTag;var pt=new Point(0,0);do{pt.x+=oTmp.offsetLeft;pt.y+=oTmp.offsetTop;oTmp=oTmp.offsetParent;}while(oTmp.tagName.toUpperCase()!="BODY");return pt;} 
function getDateDiv(){var noSelectForIE="";var noSelectForFireFox="";if(document.all){noSelectForIE="onselectstart='return false;'";}else{noSelectForFireFox="-moz-user-select:none;";}var dateDiv="";dateDiv+="<div id='calendardiv' onclick='event.cancelBubble=true' "+noSelectForIE+" style='"+noSelectForFireFox+"position:absolute;z-index:99;visibility:hidden;border:1px solid #999999;'>";dateDiv+="<table style='border:0px; background-color:#E0E0E0;' cellpadding='1' cellspacing='1' >";dateDiv+="<tr>";dateDiv+="<td><input type='button' id='PrevMonth' value='<' style='height:20px;width:20px;font-weight:bolder;' onclick='fPrevMonth()'>";dateDiv+="</td><td><select id='tbSelYear' style='border:1px solid;' onchange='fUpdateCal($V(\"tbSelYear\"),$V(\"tbSelMonth\"))'>";for(var i=startYear;i<endYear;i++){dateDiv+="<option value='"+i+"'>"+i+strYear+"</option>";}dateDiv+="</select></td><td>";dateDiv+="<select id='tbSelMonth' style='border:1px solid;' onchange='fUpdateCal($V(\"tbSelYear\"),$V(\"tbSelMonth\"))'>";for(var i=0;i<12;i++){dateDiv+="<option value='"+(i+1)+"'>"+gMonths[i]+"</option>";}dateDiv+="</select></td><td>";dateDiv+="<input type='button' id='NextMonth' value='>' style='height:20px;width:20px;font-weight:bolder;' onclick='fNextMonth()'>";dateDiv+="</td>";dateDiv+="</tr><tr>";dateDiv+="<td align='center' colspan='4'>";dateDiv+="<div style='background-color:#cccccc'><table width='100%' border='0' cellpadding='3' cellspacing='1'>";dateDiv+=fDrawCal(giYear,giMonth,dayTdHeight,dayTdTextSize);dateDiv+="</table></div>";dateDiv+="</td>";dateDiv+="</tr><tr><td align='center' colspan='4' nowrap>";dateDiv+="<span style='cursor:pointer;font-weight:bolder;' onclick='fSetDate(curYear,curMonth,curDay)' onmouseover='this.style.color=\""+gcMouseOver+"\"' onmouseout='this.style.color=\"#000000\"'>"+strToday+":"+fCurrentDate()+"</span>";dateDiv+="</tr></tr>";dateDiv+="</table></div>";return dateDiv;} 
with(document){onclick=fHideCalendar;write(getDateDiv());}