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javascript date selector

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javascript date selector Code Bank forum containing sample code and scripts to help solve common problems. Take a look and use the code to assist in your projects.

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Old August 26th, 2005, 04:31 PM
shamrog12's Avatar
shamrog12 shamrog12 is offline
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javascript date selector
javascript Code:
Original - javascript Code 
  1. <head>
  2.  
  3. <script type="text/javascript">
  4.  
  5. <!-- Begin
  6. //set todays date
  7. Now = new Date();
  8. NowDay = Now.getDate();
  9. NowMonth = Now.getMonth();
  10. NowYear = Now.getYear();
  11. if (NowYear < 2000) NowYear += 1900; //for Netscape
  12.  
  13. //function for returning how many days there are in a month including leap years
  14. function DaysInMonth(WhichMonth, WhichYear)
  15. {
  16.   var DaysInMonth = 31;
  17.   if (WhichMonth == "Apr" || WhichMonth == "Jun" || WhichMonth == "Sep" || WhichMonth == "Nov") DaysInMonth = 30;
  18.   if (WhichMonth == "Feb" && (WhichYear/4) != Math.floor(WhichYear/4))  DaysInMonth = 28;
  19.   if (WhichMonth == "Feb" && (WhichYear/4) == Math.floor(WhichYear/4))  DaysInMonth = 29;
  20.   return DaysInMonth;
  21. }
  22.  
  23. //function to change the available days in a months
  24. function ChangeOptionDays(Which)
  25. {
  26.   DaysObject = eval("document.Form1." + Which + "Day");
  27.   MonthObject = eval("document.Form1." + Which + "Month");
  28.   YearObject = eval("document.Form1." + Which + "Year");
  29.  
  30.   Month = MonthObject[MonthObject.selectedIndex].text;
  31.   Year = YearObject[YearObject.selectedIndex].text;
  32.  
  33.   DaysForThisSelection = DaysInMonth(Month, Year);
  34.   CurrentDaysInSelection = DaysObject.length;
  35.   if (CurrentDaysInSelection > DaysForThisSelection)
  36.   {
  37.     for (i=0; i<(CurrentDaysInSelection-DaysForThisSelection); i++)
  38.     {
  39.       DaysObject.options[DaysObject.options.length - 1] = null
  40.     }
  41.   }
  42.   if (DaysForThisSelection > CurrentDaysInSelection)
  43.   {
  44.     for (i=0; i<(DaysForThisSelection-CurrentDaysInSelection); i++)
  45.     {
  46.       NewOption = new Option(DaysObject.options.length + 1);
  47.       DaysObject.add(NewOption);
  48.     }
  49.   }
  50.     if (DaysObject.selectedIndex < 0) DaysObject.selectedIndex == 0;
  51. }
  52.  
  53. //function to set options to today
  54. function SetToToday(Which)
  55. {
  56.   DaysObject = eval("document.Form1." + Which + "Day");
  57.   MonthObject = eval("document.Form1." + Which + "Month");
  58.   YearObject = eval("document.Form1." + Which + "Year");
  59.  
  60.   YearObject[0].selected = true;
  61.   MonthObject[NowMonth].selected = true;
  62.  
  63.   ChangeOptionDays(Which);
  64.  
  65.   DaysObject[NowDay-1].selected = true;
  66. }
  67.  
  68. //function to write option years plus x
  69. function WriteYearOptions(YearsAhead)
  70. {
  71.   line = "";
  72.   for (i=0; i<YearsAhead; i++)
  73.   {
  74.     line += "<OPTION>";
  75.     line += NowYear + i;
  76.   }
  77.   return line;
  78. }
  79. //  End -->
  80. </script>
  81.  
  82. </head>
  83.  
  84. <body onLoad="SetToToday('FirstSelect');">
  85.  
  86. <FORM name="Form1">
  87. <SELECT name="FirstSelectDay">
  88.     <OPTION>1
  89.     <OPTION>2
  90.     <OPTION>3
  91.     <OPTION>4
  92.     <OPTION>5
  93.     <OPTION>6
  94.     <OPTION>7
  95.     <OPTION>8
  96.     <OPTION>9
  97.     <OPTION>10
  98.     <OPTION>11
  99.     <OPTION>12
  100.     <OPTION>13
  101.     <OPTION>14
  102.     <OPTION>15
  103.     <OPTION>16
  104.     <OPTION>17
  105.     <OPTION>18
  106.     <OPTION>19
  107.     <OPTION>20
  108.     <OPTION>21
  109.     <OPTION>22
  110.     <OPTION>23
  111.     <OPTION>24
  112.     <OPTION>25
  113.     <OPTION>26
  114.     <OPTION>27
  115.     <OPTION>28
  116.     <OPTION>29
  117.     <OPTION>30
  118.     <OPTION>31
  119. </SELECT>
  120. <SELECT name="FirstSelectMonth" onchange="ChangeOptionDays('FirstSelect')">
  121.     <OPTION>Jan
  122.     <OPTION>Feb
  123.     <OPTION>Mar
  124.     <OPTION>Apr
  125.     <OPTION>May
  126.     <OPTION>Jun
  127.     <OPTION>Jul
  128.     <OPTION>Aug
  129.     <OPTION>Sep
  130.     <OPTION>Oct
  131.     <OPTION>Nov
  132.     <OPTION>Dec
  133. </SELECT>
  134. <SELECT name="FirstSelectYear" onchange="ChangeOptionDays('FirstSelect')">
  135.     <SCRIPT language="JavaScript">
  136.         document.write(WriteYearOptions(50));
  137.     </SCRIPT>
  138. </SELECT>
  139. </form>
  140.  
  141. <p><center>
  142. <font face="arial, helvetica" size"-2">Free JavaScripts provided<br>
  143. by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
  144. </center><p>
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