Make a weekday calculator in VBScript

*This is another hta file which will tell you the weekday of the date you specified.
The code is a little complex so when I looked at the code after making this, even I had difficulty in understanding the code. I took the formula from the internet and this program is tested so you can be hundred percent sure this program is accurate. :)

To make the program just save the following code with a .hta file extension using notepad.

<html><head><title>WeekDay</title><HTA:APPLICATION   APPLICATIONNAME="WeekDay"   ID="WeekDay"   VERSION="1.0"   MAXIMIZEBUTTON="no"   SCROLL="no"/></head> <script language="VBScript"> Sub Window_OnLoad    Dim width,height    width=260    height=165    self.ResizeTo width,height   'This method will be called when the application loads   'Add your code here End Sub  Function Validate On Error Resume Next CY = CYear.Value CM = CMonth.value CD = CDay.value Chk = Int(CY/4) If (CY = "") Then Box.Value = "Enter a year!" Else If Not (IsNumeric(CY)) Then Box.Value = "Invalid date!" Else If (CY < 1000 Or CY > 9999) Then Box.Value = "Invalid date!" Else If ((CM = "February" Or CM = "April" Or CM = "June" Or CM = "September" Or CM = "November") And CD = 31) Then Box.Value = "Invalid date!" Else If (CM = "February" And CD = 30) Then Box.Value = "Invalid date!" Else If (CM = "February" And CD = 29 And Chk*4 <> Int(CY)) Then Box.Value = "Invalid date!" Else IA() End If End If End If End If End If End If End Function  Function IA CY = CYear.Value CC = Left(CY, 2) CHK = CC Mod 4 If (CHK = 3) Then XC.Value = 0 NUM.Value = 0 IB() Else If (CHK = 0) Then XC.Value = 6 NUM.Value = 0 IB() Else If (CHK = 1) Then XC.Value = 4 NUM.Value = 0 IB() Else If (CHK = 2) Then XC.Value = 2 NUM.Value = 0 IB() Else MsgBox("ERROR!") End If End If End If End If End Function  Function IB CY = Int(CYear.Value) CC = Int(Right(CY, 2)) NUM.Value = NUM.Value+1 CHK = NUM.Value*4 If (Int(CHK) < Int(CC)) Then Junk = SetTimeOut("IB()", 1) Else If (Int(CHK) = Int(CC)) Then XY.Value = (CC+NUM.Value) IC() Else If (Int(CHK) > Int(CC)) Then XY.Value = (CC+(NUM.Value-1)) IC() Else IC() End If End If End If End Function  Function IC CY = Right(CYear.Value, 2) CM = CMonth.Value Chk = CY Mod 4 If (CY = 0)  Then XY.Value = 0 ID() Else If (Chk = 0 And (CM = "January" Or CM = "February")) Then XY.Value = (XY.Value-1) Mod 7 ID() Else XY.Value = XY.Value Mod 7 ID() End If End If End Function  Function ID IDM = Array(0, 3, 3, 6, 1, 4, 6, 2, 5, 0, 3, 5) XM.Value = IDM(CMonth.selectedIndex) CD = CDay.Value XD.Value = CD Mod 7 Finish() End Function  Function Finish DDay = Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday") Chk = Int(XC.Value)+Int(XY.Value)+Int(XM.Value)+Int(XD.Value) Box.Value = (DDay(Chk Mod 7)) End Function  Sub CYear_OnKeyPress If (window.event.keycode < 48 Or window.event.keycode > 57) Then window.event.returnvalue = False Else End If End Sub  </script> <body bgcolor="white"><input type="hidden" id="NUM"><input type="hidden" id="XC"><input type="hidden" id="XY"><input type="hidden" id="XM"><input type="hidden" id="XD"><table align="center" width="200" border="1"><tr><td align="center"><input type="text" id="box" size="30" style="text-align:center" maxlength="0"></td></tr><tr><td align="center"><select id="CDay"><option value="1">1</option><option value="2">2</option><option value="3">3</option><option value="4">4</option><option value="5">5</option><option value="6">6</option><option value="7">7</option><option value="8">8</option><option value="9">9</option><option value="10">10</option><option value="11">11</option><option value="12">12</option><option value="13">13</option><option value="14">14</option><option value="15">15</option><option value="16">16</option><option value="17">17</option><option value="18">18</option><option value="19">19</option><option value="20">20</option><option value="21">21</option><option value="22">22</option><option value="23">23</option><option value="24">24</option><option value="25">25</option><option value="26">26</option><option value="27">27</option><option value="28">28</option><option value="29">29</option><option value="30">30</option><option value="31">31</option></select><select id="CMonth"><option value="January">January</option><option value="February">February</option><option value="March">March</option><option value="April">April</option><option value="May">May</option><option value="June">June</option><option value="July">July</option><option value="August">August</option><option value="September">September</option><option value="October">October</option><option value="November">November</option><option value="December">December</option></select><input type="text" id="CYear" size="2" maxlength="4"></td></tr><tr><td align="center"><input type="button" value="Calculate" onClick="Validate"></td></tr></table></body></html>

Caution : Modifing codings will damage your data so dont modify the codings..

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Sunday 30 June 2013