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Conversion of Jualian Date entry to standard Date

Posted on 2008-06-13
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Last Modified: 2010-04-09
Hopefully a simple answer for this one but I need it quickly so here goes.

I need a form that when a person plugs in a 3-digit Julian date representing the day of the year then hits submit and the standard date appears.  Such as someone types in 165 then hits submit (or if no button is required and something automatically does it would be cool) then a field below it states Jun 13, 2008

Any ideas?
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Question by:austintre
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Expert Comment

by:Zvonko
ID: 21778415
So the Julian date corelates allways the the current Year, right?
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Author Comment

by:austintre
ID: 21778418
Yes exactly
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LVL 63

Accepted Solution

by:
Zvonko earned 500 total points
ID: 21778567
Check this:
<html>
<head>
<title>Zvonko &#42;</title>
<script>
function getDate(theField){
  var theForm = theField.form;
  var jDay = theField.value.replace(/\D/g,'');
  if(jDay!=theField.value) theField.value = jDay;
  theForm.date.value = "";
  if(jDay){
    var theDate = new Date();
    var YY = theDate.getFullYear();
    var theDate = new Date(YY,0,jDay);
    var MM = theDate.getMonth()+1;
    var DD = theDate.getDate();
    theForm.date.value = d2(DD)+"."+d2(MM)+"."+YY;
  }
}
function d2(theNum){
  if(theNum<10) return "0"+theNum;
  return theNum;
}
</script>
</head>
<body>
<form>
<input type="text" name="julian" size="3" maxlength="3" onKeyUp="getDate(this)" >
<input type="text" name="date" size="10" onFosus="this.blur()" >
</form>
</body>
</html>

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Author Comment

by:austintre
ID: 21778601
That works - but can I format it so that it shows Jun 13, 2008?  If not this is good enough!

Cheers
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LVL 63

Expert Comment

by:Zvonko
ID: 21779013
Open a new question for that :-)
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Author Comment

by:austintre
ID: 21779049
That was part of the question to begin with.  

That is like me going to my doctor and asking for a diagnosis and he hands it to me in French and then tells me to come back again tomorrow so he can bill me again to get it in English.
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LVL 63

Expert Comment

by:Zvonko
ID: 21779473
So in English: Is it really for you a problem to convert the MM number to one of twelve Month names?
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Author Comment

by:austintre
ID: 21779704
Yes it is considering I have no clue how to use JavaScript.  I don't do this for a living.  Just trying to help someone out.  But don't worry about it.  Sorry to have wasted your "genius" time.  

Thank you for the solution you gave it got me far enough.
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LVL 63

Expert Comment

by:Zvonko
ID: 21779904
For a ThankYou I do everything ;-)
<html>
<head>
<title>Zvonko &#42;</title>
<script>
function getDate(theField){
  var theForm = theField.form;
  var jDay = theField.value.replace(/\D/g,'');
  if(jDay!=theField.value) theField.value = jDay;
  theForm.date.value = "";
  if(jDay){
    var theDate = new Date();
    var YY = theDate.getFullYear();
    var theDate = new Date(YY,0,jDay);
    var MM = "Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec".split(',')[theDate.getMonth()];
    var DD = theDate.getDate();
    theForm.date.value = MM+" "+d2(DD)+", "+YY;
  }
}
function d2(theNum){
  if(theNum<10) return "0"+theNum;
  return theNum;
}
</script>
</head>
<body>
<form>
<input type="text" name="julian" size="3" maxlength="3" onKeyUp="getDate(this)" >
<input type="text" name="date" size="10" onFocus="this.blur()" >
</form>
</body>
</html>

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Author Comment

by:austintre
ID: 21779921
Thank you
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Expert Comment

by:Zvonko
ID: 21779949
:-)
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