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can someone help me with a date comparison checkit is always false

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bankofalltrades

bankofalltrades

MIS
Apr 22, 2008
9
US
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "<html xmlns="<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<script type="text/javascript">
function validate_required4(){
var f = document.getElementById('Call_Date').value;
var d = new Date(f);
var x = (isNaN(d))
if (x==false){
var d = new Date();
d.setDate(d.getDate());
var formattedDate = d.getMonth() + '/' + d.getDate() + '/' + d.getFullYear() + ' ' + d.getHours() + ':' + d.getMinutes();
var e = new Date(formattedDate);
var checkit = e > f;
alert(checkit);
}
if (x==true)
{alert("Please enter a valid date format mm/dd/yy");return false;}
}

</script>

<style type="text/css"></style>

</head>
<body>

<input type="text" id="Call_Date" name="Call_Date" />
<input type="button" value="validate date" onclick="validate_required4()" />

</body>
</html>
 
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Here are 3 test results - they show what the internal values are for your variables and why they don't match


formattedDate =[3/23/2008 15:34]
e=[Sun Mar 23 15:34:00 EDT 2008]
f=[3/23/2008]

formattedDate =[3/23/2008 15:34]
e=[Sun Mar 23 15:34:00 EDT 2008]
f=[3/23/2008 15:34:00]

formattedDate =[3/23/2008 15:34]
e=[Sun Mar 23 15:34:00 EDT 2008]
f=[3/23/2008 15:34:00 EDT]


Hope this helps ...
 
Upvote 0 Downvote
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "<html xmlns="<head>
<title>test</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<script type="text/javascript">
function validate_required4(){
var calldate = document.getElementById('Call_Date').value;
var newdate = new Date(calldate);
var isitavaliddate = (isNaN(newdate));
if (isitavaliddate==false){
var todaydate = new Date();
todaydate.setDate(todaydate.getDate());
var formattedDate = todaydate.getMonth() + '/' + todaydate.getDate() + '/' + todaydate.getFullYear() + ' ' + todaydate.getHours() + ':' + todaydate.getMinutes();
var checkit = (formattedDate > calldate);
alert(formattedDate);
alert(calldate);
alert(checkit);
}
if (x==true)
{alert("Please enter a valid date format mm/dd/yy");return false;}
}

</script>

<style type="text/css"></style>

</head>
<body>

<input type="text" id="Call_Date" name="Call_Date" />
<input type="button" value="validate date" onclick="validate_required4()" />

</body>
</html>
 
Upvote 0 Downvote
What are you actually trying to validate?

The method you are using will accept dates of 01/45/08 ( clearly not a date) as it will evaluate to 02/14/08 (which makes some sort of sense).

If you're looking to validate then you really need to validate the component parts mm, dd, and yy

 
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