A very nice scripted calendar

<script language=javascript> var DS_x,DS_y; function dateSelector() //Construct a dateSelector object to implement a date input box in calendar form. { var myDate=new Date(); this.year=myDate.getFullYear(); //Define the year attribute, year, and the default value is the current system year. this.month=myDate.getMonth()+1; //Define the month attribute, month, and the default value is the current system month. this.date=myDate.getDate(); //Define the date attribute, day. The default value is the day of the current system. this.inputName=''; //Define the inputName attribute, which is the name of the input box. The default value is empty. Note: Multiple date input boxes appear on the same page, and there cannot be duplicate names! this.display=display; //Define the display method to display the date input box. } function display() //Define the display method of dateSelector, which will implement a date selection box in calendar form. { var week=new Array('日','一','二','三','四','五','六'); document.write("<style type=text/css>" ); document.write(" .ds_font td,span { font: normal 12px 宋体; color: #000000; }"); document.write(" .ds_border { border: 1px solid #000000; cursor: hand; background-color : #DDDDDD }"); document.write(" .ds_border2 { border: 1px solid #000000; cursor: hand; background-color: #DDDDDD }"); document.write("</style>"); document. write("<input style='text-align:center;' id='DS_"+this.inputName+"' name='"+this.inputName+"' value='"+this.year+"-"+this. month+"-"+this.date+"' title=Double-click to edit ondblclick='this.readOnly=false;this.focus()' onblur='this.readOnly=true' readonly>"); document.write( "<button style='width:60px;height:18px;font-size:12px;margin:1px;border:1px solid #A4B3C8;background-color:#DFE7EF;' type=button onclick=this.nextSibling.style. display='block' onfocus=this.blur()>Select date</button>"); document.write("<div style='position:absolute;display:none;text-align:center;width:0px; height:0px;overflow:visible' onselectstart='return false;'>"); document.write(" <div style='position:absolute;left:-60px;top:20px;width:142px;height:165px; background-color:#F6F6F6;border:1px solid #245B7D;' class=ds_font>"); document.write(" <table cellpadding=0 cellspacing=1 width=140 height=20 bgcolor=#CEDAE7 onmousedown='DS_x= event.x-parentNode.style.pixelLeft;DS_y=event.y-parentNode.style.pixelTop;setCapture();' onmouseup='releaseCapture();' onmousemove='dsMove(this.parentNode)' style='cursor: move;'>"); document.write(" <tr align=center>"); document.write(" <td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick =subYear(this) title='Reduce Year'><<</td>"); document.write(" <td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick=subMonth(this) title='Reduce month'><</td>"); document.write(" <td width=52%><b>"+this.year+"</b><b> year</b><b>"+this.month+"</b><b>month</b></td>"); document.write(" <td width=12% onmouseover=this.className= 'ds_border' onmouseout=this.className='' onclick=addMonth(this) title='Add month'>></td>"); document.write(" <td width=12% onmouseover=this.className=' ds_border' onmouseout=this.className='' onclick=addYear(this) title='Add Year'>>></td>"); document.write(" </tr>"); document.write(" < /table>"); document.write(" <table cellpadding=0 cellspacing=0 width=140 height=20 onmousedown='DS_x=event.x-parentNode.style.pixelLeft;DS_y=event.y-parentNode.style. pixelTop;setCapture();' onmouseup='releaseCapture();' onmousemove='dsMove(this.parentNode)' style='cursor:move;'>"); document.write(" <tr align=center>") ; for(i=0;i<7;i++) document.write(" <td>"+week[i]+"</td>"); document.write(" </tr>"); document. write(" </table>"); document.write(" <table cellpadding=0 cellspacing=2 width=140 bgcolor=#EEEEEE>"); for(i=0;i<6;i++) { document.write (" <tr align=center>"); for(j=0;j<7;j++) document.write(" <td width=10% height=16 onmouseover=if(this.innerText!=''&&this. className!='ds_border2')this.className='ds_border' onmouseout=if(this.className!='ds_border2')this.className='' onclick=getvalue(this,document.all('DS_"+this.inputName+ "'))></td>"); document.write(" </tr>"); } document.write(" </table>"); document.write(" <span style=cursor:hand onclick =this.parentNode.parentNode.style.display='none'>【Close】</span>"); document.write(" </div>"); document.write("</div>"); dateShow (document.all("DS_"+this.inputName).nextSibling.nextSibling.childNodes[0].childNodes[2],this.year,this.month) } function subYear(obj) //Decrease the year { var myObj =obj.parentNode.parentNode.parentNode.cells[2].childNodes; myObj[0].innerHTML=eval(myObj[0].innerHTML)-1; dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval (myObj[0].innerHTML),eval(myObj[2].innerHTML)) } function addYear(obj) //Add year { var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes; myObj[ 0].innerHTML=eval(myObj[0].innerHTML)+1; dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj[2].innerHTML) ) } function subMonth(obj) //Decrease the month { var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes; var month=eval(myObj[2].innerHTML)-1; if(month= =0) { month=12; subYear(obj); } myObj[2].innerHTML=month; dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj [2].innerHTML)) } function addMonth(obj) //Add month { var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes; var month=eval(myObj[2].innerHTML)+1 ; if(month==13) { month=1; addYear(obj); } myObj[2].innerHTML=month; dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML ),eval(myObj[2].innerHTML)) } function dateShow(obj,year,month) //Show the day of each month { var myDate=new Date(year,month-1,1); var today=new Date (); var day=myDate.getDay(); var selectDate=obj.parentNode.parentNode.previousSibling.previousSibling.value.split('-'); var length; switch(month) { case 1: case 3: case 5 : case 7: case 8: case 10: case 12: length=31; break; case 4: case 6: case 9: case 11: length=30; break; case 2: if((year%4==0) &&(year%100!=0)||(year%400==0)) length=29; else length=28; } for(i=0;i<obj.cells.length;i++) { obj.cells [i].innerHTML=''; obj.cells[i].style.color=''; obj.cells[i].className=''; } for(i=0;i<length;i++) { obj .cells[i+day].innerHTML=(i+1); if(year==today.getFullYear()&&(month-1)==today.getMonth()&&(i+1)==today.getDate ()) obj.cells[i+day].style.color='red'; if(year==eval(selectDate[0])&&month==eval(selectDate[1])&&(i+1)== eval(selectDate[2])) obj.cells[i+day].className='ds_border2'; } } function getvalue(obj,inputObj) // Pass the selected date to the input box { var myObj=inputObj.nextSibling. nextSibling.childNodes[0].childNodes[0].cells[2].childNodes; if(obj.innerHTML) inputObj.value=myObj[0].innerHTML+"-"+myObj[2].innerHTML+"-"+obj .innerHTML; inputObj.nextSibling.nextSibling.style.display='none'; for(i=0;i<obj.parentNode.parentNode.parentNode.cells.length;i++) obj.parentNode.parentNode.parentNode.cells[i ].className=''; obj.className='ds_border2' } function dsMove(obj) //Implement layer dragging { if(event.button==1) { var X=obj.clientLeft; var Y=obj. clientTop; obj.style.pixelLeft=X+(event.x-DS_x); obj.style.pixelTop=Y+(event.y-DS_y); } } </script> From <script language=javascript> var myDate=new dateSelector (); myDate.year--; myDate.inputName='start_date'; //Note that the name of the input box is set here. Duplicate names cannot appear in the date input box on the same page. myDate.display(); </script>