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How To Implement A Date Picker On A Web Page

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Some pages may need users to input date values. It would be nice if the users just need to click and pick and done. This way we may also eliminate the possible input errors. Below is the code I used to implement this. You may want to save it as datepicker.js for other web pages to use. I also attached 3 files for you to download. All you need to do is unzip the 3 files to a directory under any web server and start trying it.

If you are using jsp, you can refer to the submited field by adding something like request.getParameter("date1") to your page. If you're using php, you may try $_REQUEST["date1"] to get the value out of the submited form field. Of course you have to rename the html file to .jsp or .php.

var winCal;var dtToday=new Date();var Cal;var docCal;var MonthName=["January", "February", "March", "April", "May", "June","July", "August", "September", "October", "November", "December"];var WeekDayName=["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]; var exDateTime;//Existing Date and Time//Configurable parametersvar cnTop="200";//top coordinate of calendar window.var cnLeft="500";//left coordinate of calendar windowvar WindowTitle ="DateTime Picker";//Date Time Picker title.var WeekChar=2;//number of character for week day. if 2 then Mo,Tu,We. if 3 then Mon,Tue,Wed.var CellWidth=20;//Width of day cell.var DateSeparator="/";//Date Separator, you can change it to "/" if you want.var TimeMode=24;//default TimeMode value. 12 or 24var ShowLongMonth=true;//Show long month name in Calendar header. example: "January".var ShowMonthYear=true;//Show Month and Year in Calendar header.var MonthYearColor="#cc0033";//Font Color of Month and Year in Calendar header.var WeekHeadColor="#0099CC";//Background Color in Week header.var SundayColor="#6699FF";//Background color of Sunday.var SaturdayColor="#CCCCFF";//Background color of Saturday.var WeekDayColor="white";//Background color of weekdays.var FontColor="blue";//color of font in Calendar day cell.var TodayColor="#FFFF33";//Background color of today.var SelDateColor="#FFFF99";//Backgrond color of selected date in textbox.var YrSelColor="#cc0033";//color of font of Year selector.var ThemeBg="";//Background image of Calendar window.//end Configurable parameters//end Global variablefunction NewCal(pCtrl,pFormat,pShowTime,pTimeMode){ Cal=new Calendar(dtToday); if ((pShowTime!=null) && (pShowTime)) { Cal.ShowTime=true; if ((pTimeMode!=null) &&((pTimeMode=='12')||(pTimeMode=='24'))) { TimeMode=pTimeMode; } } if (pCtrl!=null) Cal.Ctrl=pCtrl; if (pFormat!=null) Cal.Format=pFormat.toUpperCase(); exDateTime=document.getElementById(pCtrl).value; if (exDateTime!="")//Parse Date String { var Sp1;//Index of Date Separator 1 var Sp2;//Index of Date Separator 2 var tSp1;//Index of Time Separator 1 var tSp1;//Index of Time Separator 2 var strMonth; var strDate; var strYear; var intMonth; var YearPattern; var strHour; var strMinute; var strSecond; //parse month Sp1=exDateTime.indexOf(DateSeparator,0) Sp2=exDateTime.indexOf(DateSeparator,(parseInt(Sp1)+1)); if ((Cal.Format.toUpperCase()=="DDMMYYYY") || (Cal.Format.toUpperCase()=="DDMMMYYYY")) { strMonth=exDateTime.substring(Sp1+1,Sp2); strDate=exDateTime.substring(0,Sp1); } else if ((Cal.Format.toUpperCase()=="MMDDYYYY") || (Cal.Format.toUpperCase()=="MMMDDYYYY")) { strMonth=exDateTime.substring(0,Sp1); strDate=exDateTime.substring(Sp1+1,Sp2); } if (isNaN(strMonth)) intMonth=Cal.GetMonthIndex(strMonth); else intMonth=parseInt(strMonth,10)-1; if ((parseInt(intMonth,10)>=0) && (parseInt(intMonth,10)<12)) Cal.Month=intMonth; //end parse month //parse Date if ((parseInt(strDate,10)<=Cal.GetMonDays()) && (parseInt(strDate,10)>=1)) Cal.Date=strDate; //end parse Date //parse year strYear=exDateTime.substring(Sp2+1,Sp2+5); YearPattern=/^\d{4}$/; if (YearPattern.test(strYear)) Cal.Year=parseInt(strYear,10); //end parse year //parse time if (Cal.ShowTime==true) { tSp1=exDateTime.indexOf(":",0) tSp2=exDateTime.indexOf(":",(parseInt(tSp1)+1)); strHour=exDateTime.substring(tSp1,(tSp1)-2); Cal.SetHour(strHour); strMinute=exDateTime.substring(tSp1+1,tSp2); Cal.SetMinute(strMinute); strSecond=exDateTime.substring(tSp2+1,tSp2+3); Cal.SetSecond(strSecond); } } winCal=window.open("","DateTimePicker","toolbar=0,status=0,menubar=0,fullscreen=no,width=195,height=245,resizable=0,top="+cnTop+",left="+cnLeft); docCal=winCal.document; RenderCal();}function RenderCal(){ var vCalHeader; var vCalData; var vCalTime; var i; var j; var SelectStr; var vDayCount=0; var vFirstDay; docCal.open(); docCal.writeln("<html><head><title>"+WindowTitle+"</title>"); docCal.writeln("<script>var winMain=window.opener;</script>"); docCal.writeln("</head><body background='"+ThemeBg+"' link="+FontColor+" vlink="+FontColor+"><form name='Calendar'>"); vCalHeader="<table border=1 cellpadding=1 cellspacing=1 width='100%' align=\"center\" valign=\"top\">\n"; //Month Selector vCalHeader+="<tr>\n<td colspan='7'><table border=0 width='100%' cellpadding=0 cellspacing=0><tr><td align='left'>\n"; vCalHeader+="<select name=\"MonthSelector\" onChange=\"java script:winMain.Cal.SwitchMth(this.selectedIndex);winMain.RenderCal();\">\n"; for (i=0;i<12;i++) { if (i==Cal.Month) SelectStr="Selected"; else SelectStr=""; vCalHeader+="<option "+SelectStr+" value >"+MonthName[i]+"\n"; } vCalHeader+="</select></td>"; //Year selector vCalHeader+="\n<td align='right'><a href=\"java script:winMain.Cal.DecYear();winMain.RenderCal()\"><b><font color=\""+YrSelColor+"\"><</font></b></a><font face=\"Verdana\" color=\""+YrSelColor+"\" size=2><b> "+Cal.Year+" </b></font><a href=\"java script:winMain.Cal.IncYear();winMain.RenderCal()\"><b><font color=\""+YrSelColor+"\">></font></b></a></td></tr></table></td>\n"; vCalHeader+="</tr>"; //Calendar header shows Month and Year if (ShowMonthYear) vCalHeader+="<tr><td colspan='7'><font face='Verdana' size='2' align='center' color='"+MonthYearColor+"'><b>"+Cal.GetMonthName(ShowLongMonth)+" "+Cal.Year+"</b></font></td></tr>\n"; //Week day header vCalHeader+="<tr bgcolor="+WeekHeadColor+">"; for (i=0;i<7;i++) { vCalHeader+="<td align='center'><font face='Verdana' size='2'>"+WeekDayName[i].substr(0,WeekChar)+"</font></td>"; } vCalHeader+="</tr>"; docCal.write(vCalHeader); //Calendar detail CalDate=new Date(Cal.Year,Cal.Month); CalDate.setDate(1); vFirstDay=CalDate.getDay(); vCalData="<tr>"; for (i=0;i<vFirstDay;i++) { vCalData=vCalData+GenCell(); vDayCount=vDayCount+1; } for (j=1;j<=Cal.GetMonDays();j++) { var strCell; vDayCount=vDayCount+1; if ((j==dtToday.getDate())&&(Cal.Month==dtToday.getMonth())&&(Cal.Year==dtToday.getFullYear())) strCell=GenCell(j,true,TodayColor);//Highlight today's date else { if (j==Cal.Date) { strCell=GenCell(j,true,SelDateColor); } else { if (vDayCount%7==0) strCell=GenCell(j,false,SaturdayColor); else if ((vDayCount+6)%7==0) strCell=GenCell(j,false,SundayColor); else strCell=GenCell(j,null,WeekDayColor); } } vCalData=vCalData+strCell; if((vDayCount%7==0)&&(j<Cal.GetMonDays())) { vCalData=vCalData+"</tr>\n<tr>"; } } docCal.writeln(vCalData); //Time picker if (Cal.ShowTime) { var showHour; showHour=Cal.getShowHour(); vCalTime="<tr>\n<td colspan='7' align='center'>"; vCalTime+="<input type='text' name='hour' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+showHour+" onchange=\"java script:winMain.Cal.SetHour(this.value)\">"; vCalTime+=" : "; vCalTime+="<input type='text' name='minute' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+Cal.Minutes+" onchange=\"java script:winMain.Cal.SetMinute(this.value)\">"; vCalTime+=" : "; vCalTime+="<input type='text' name='second' maxlength=2 size=1 style=\"WIDTH: 22px\" value="+Cal.Seconds+" onchange=\"java script:winMain.Cal.SetSecond(this.value)\">"; if (TimeMode==12) { var SelectAm =(parseInt(Cal.Hours,10)<12)? "Selected":""; var SelectPm =(parseInt(Cal.Hours,10)>=12)? "Selected":""; vCalTime+="<select name=\"ampm\" onchange=\"java script:winMain.Cal.SetAmPm(this.options[this.selectedIndex].value);\">"; vCalTime+="<option "+SelectAm+" value=\"AM\">AM</option>"; vCalTime+="<option "+SelectPm+" value=\"PM\">PM<option>"; vCalTime+="</select>"; } vCalTime+="\n</td>\n</tr>"; docCal.write(vCalTime); } //end time picker docCal.writeln("\n</table>"); docCal.writeln("</form></body></html>"); docCal.close();}function GenCell(pValue,pHighLight,pColor)//Generate table cell with value{ var PValue; var PCellStr; var vColor; var vHLstr1;//HighLight string var vHlstr2; var vTimeStr; if (pValue==null) PValue=""; else PValue=pValue; if (pColor!=null) vColor="bgcolor=\""+pColor+"\""; else vColor=""; if ((pHighLight!=null)&&(pHighLight)) {vHLstr1="color='red'><b>";vHLstr2="</b>";} else {vHLstr1=">";vHLstr2="";} if (Cal.ShowTime) { vTimeStr="winMain.document.getElementById('"+Cal.Ctrl+"').value+=' '+"+"winMain.Cal.getShowHour()"+"+':'+"+"winMain.Cal.Minutes"+"+':'+"+"winMain.Cal.Seconds"; if (TimeMode==12) vTimeStr+="+' '+winMain.Cal.AMorPM"; } else vTimeStr=""; PCellStr="<td "+vColor+" width="+CellWidth+" align='center'><font face='verdana' size='2'"+vHLstr1+"<a href=\"java script:winMain.document.getElementById('"+Cal.Ctrl+"').value='"+Cal.FormatDate(PValue)+"';"+vTimeStr+";window.close();\">"+PValue+"</a>"+vHLstr2+"</font></td>"; return PCellStr;}function Calendar(pDate,pCtrl){ //Properties this.Date=pDate.getDate();//selected date this.Month=pDate.getMonth();//selected month number this.Year=pDate.getFullYear();//selected year in 4 digits this.Hours=pDate.getHours(); if (pDate.getMinutes()<10) this.Minutes="0"+pDate.getMinutes(); else this.Minutes=pDate.getMinutes(); if (pDate.getSeconds()<10) this.Seconds="0"+pDate.getSeconds(); else this.Seconds=pDate.getSeconds(); this.MyWindow=winCal; this.Ctrl=pCtrl; this.Format="ddMMyyyy"; this.Separator=DateSeparator; this.ShowTime=false; if (pDate.getHours()<12) this.AMorPM="AM"; else this.AMorPM="PM"; }function GetMonthIndex(shortMonthName){ for (i=0;i<12;i++) { if (MonthName[i].substring(0,3).toUpperCase()==shortMonthName.toUpperCase()) { return i;} }}Calendar.prototype.GetMonthIndex=GetMonthIndex;function IncYear(){ Cal.Year++;}Calendar.prototype.IncYear=IncYear;function DecYear(){ Cal.Year--;}Calendar.prototype.DecYear=DecYear; function SwitchMth(intMth){ Cal.Month=intMth;}Calendar.prototype.SwitchMth=SwitchMth;function SetHour(intHour){ var MaxHour; var MinHour; if (TimeMode==24) { MaxHour=23;MinHour=0} else if (TimeMode==12) { MaxHour=12;MinHour=1} else alert("TimeMode can only be 12 or 24"); var HourExp=new RegExp("^\\d\\d$"); if (HourExp.test(intHour) && (parseInt(intHour,10)<=MaxHour) && (parseInt(intHour,10)>=MinHour)) { if ((TimeMode==12) && (Cal.AMorPM=="PM")) { if (parseInt(intHour,10)==12) Cal.Hours=12; else Cal.Hours=parseInt(intHour,10)+12; } else if ((TimeMode==12) && (Cal.AMorPM=="AM")) { if (intHour==12) intHour-=12; Cal.Hours=parseInt(intHour,10); } else if (TimeMode==24) Cal.Hours=parseInt(intHour,10); }}Calendar.prototype.SetHour=SetHour;function SetMinute(intMin){ var MinExp=new RegExp("^\\d\\d$"); if (MinExp.test(intMin) && (intMin<60)) Cal.Minutes=intMin;}Calendar.prototype.SetMinute=SetMinute;function SetSecond(intSec){ var SecExp=new RegExp("^\\d\\d$"); if (SecExp.test(intSec) && (intSec<60)) Cal.Seconds=intSec;}Calendar.prototype.SetSecond=SetSecond;function SetAmPm(pvalue){ this.AMorPM=pvalue; if (pvalue=="PM") { this.Hours=(parseInt(this.Hours,10))+12; if (this.Hours==24) this.Hours=12; } else if (pvalue=="AM") this.Hours-=12; }Calendar.prototype.SetAmPm=SetAmPm;function getShowHour(){ var finalHour; if (TimeMode==12) { if (parseInt(this.Hours,10)==0) { this.AMorPM="AM"; finalHour=parseInt(this.Hours,10)+12; } else if (parseInt(this.Hours,10)==12) { this.AMorPM="PM"; finalHour=12; } else if (this.Hours>12) { this.AMorPM="PM"; if ((this.Hours-12)<10) finalHour="0"+((parseInt(this.Hours,10))-12); else finalHour=parseInt(this.Hours,10)-12; } else { this.AMorPM="AM"; if (this.Hours<10) finalHour="0"+parseInt(this.Hours,10); else finalHour=this.Hours; } } else if (TimeMode==24) { if (this.Hours<10) finalHour="0"+parseInt(this.Hours,10); else finalHour=this.Hours; } return finalHour; } Calendar.prototype.getShowHour=getShowHour; function GetMonthName(IsLong){ var Month=MonthName[this.Month]; if (IsLong) return Month; else return Month.substr(0,3);}Calendar.prototype.GetMonthName=GetMonthName;function GetMonDays()//Get number of days in a month{ var DaysInMonth=[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; if (this.IsLeapYear()) { DaysInMonth[1]=29; } return DaysInMonth[this.Month]; }Calendar.prototype.GetMonDays=GetMonDays;function IsLeapYear(){ if ((this.Year%4)==0) { if ((this.Year%100==0) && (this.Year%400)!=0) { return false; } else { return true; } } else { return false; }}Calendar.prototype.IsLeapYear=IsLeapYear;function FormatDate(pDate){ if (this.Format.toUpperCase()=="DDMMYYYY") return (pDate+DateSeparator+(this.Month+1)+DateSeparator+this.Year); else if (this.Format.toUpperCase()=="DDMMMYYYY") return (pDate+DateSeparator+this.GetMonthName(false)+DateSeparator+this.Year); else if (this.Format.toUpperCase()=="MMDDYYYY") return ((this.Month+1)+DateSeparator+pDate+DateSeparator+this.Year); else if (this.Format.toUpperCase()=="MMMDDYYYY") return (this.GetMonthName(false)+DateSeparator+pDate+DateSeparator+this.Year); }Calendar.prototype.FormatDate=FormatDate;


And below is an example of html file that uses the script:

<html><head><script src="datepicker.js"></script></head><body>Pick a Date:<form><input id="date1" type="text" name="date1" size="8" maxlength="10"><a href="java script:NewCal('date1','mmddyyyy',false)"><img src="cal.gif" width="16" height="16" border="0" alt="Pick a date"></a></form></body></html>

datepicker.zip


iGuest

Date picker formatHow To Implement A Date Picker On A Web PageHi. I have this same script on my site and the default format is d/m/y and I believe yours is the same format. I wanted to change mine to read m/d/y. Is yours set up that way?-reply by Chris

iGuest

Javascript CalendarHow To Implement A Date Picker On A Web Page

Hello!

Your initiative is worth it. It's not very harsh to implement your script, I didn't have to read the code to get what I should do.

 I have noticed that your code got "java script" instead of "javascript" when you call some javascript functionnalities through html. Furthermore, the number of arguments when the function is called is three, while the declaration contains four ones. I know it's protecting with a test in the line 40, but for the initial example, it's better to put everything all the way.

Thanks for all and Good Luck!

-reply by Mohamed Ennahdi El Idrissi

iGuest

How to hightlight the day with date How To Implement A Date Picker On A Web Page

actually we r highlighting the date  using this code

date = calendar.Get(Calendar.DAY_OF_MONTH); but how to highlight the current day for example if it is monday and the date is16th then it have to highlight  the monday and 16th date

-question by rupesh

Kratos123

Thank you, it`s very cool.


rpgsearcherz

This is a pretty helpful script. I'll definitely need it for a future site of mine.I like that you posted everything there as well so we can edit what we need to for visibility changes. The commenting in it is pretty solid!