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restrict date entry to date() - 90 1

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deharris2003

deharris2003

Programmer
Jul 1, 2003
41
US
I am new to javascript. What I want to do is not allow the user to enter a date that is greater than 90 days in the past. I have written the following. doesn't seem to work. Can you tell me what I am doing wrong

<script type=&quot;javascript&quot;>
function verifyDate(field)
{
var today = date();
if field < today
{
alert(&quot;date must be within 90 days of today&quot;)
}
}
</script>
 
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what is field ?

Known is handfull, Unknown is worldfull
 
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firstly dont keep it as a textfield as the user can enter any data, keep it as a dropwdown menu (MM/DD/YY).
is this suggestion o.k?

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Sure I can do that. But I would need help in sending the data to the function
 
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u have to change ur function. are u hell bent on retaining ur old function?

Known is handfull, Unknown is worldfull
 
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Well Not really cause it doesnt work. I am not really good at javascript just leaning it really.
 
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then please rewrite it. call the funtion when the form is submitted. get the values of the select boxes and create a date out of it. its pretty simple. a search in this forum will yield better results...

Known is handfull, Unknown is worldfull
 
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deharris2003, here mate, have a play around with this code. Should get you further down the track.

[tt]
<html>
<head>
<script>
function doValidateField(objField){
// Get today's date
var dateToday = new Date();
//get the date from the string entered in the field
var dateEntered = new Date(objField.value);
// Subtracting two dates gives us the number of milliseconds
// between them
var intDateDiff = dateToday - dateEntered;
// Divide this by 86400000 (milliseconds in a day)
// and floor it to round off any decimal
var intDaysDiff = Math.floor(intDateDiff / 86400000);
//check if the days difference is less than 0
// ie some time in the future:
if(intDaysDiff < 0){
//if it is, alert the user
alert('The date cannot be greater than today\'s date.\n' +
'Please enter a date no greater than 90 days prior to today');
}
//check if the days difference is greater than 90
// ie too far in the past:
if(intDaysDiff > 90){
//if it is, alert the user
alert('The date cannot be more than 90 days prior to today.\n' +
'Please enter a date no greater than 90 days prior to today');
}
}
</script>
</head>
<body>
<input type=&quot;text&quot;
name=&quot;fldDateEntered&quot;
id=&quot;fldDateEntered&quot;
onblur=&quot;doValidateField(this);&quot;
value=&quot;9/24/2003&quot;>
</body>
</html>[/tt]

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