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Reply posted by Jake Howlett on Fri 9 Aug 2002 in response to Form Validator R2.0

Re: Date Validation?

Mr Paynter,


I take it this means you have a job then?


You won't be able to do it this way as, as it stands, you are trying to compare
two *strings*. You need to convert them both to JS time/date objects first.
Here's a function that should work:


[<code>]function checkDateFollows( dp1, up1 ){


dp1 = frm.FieldA.value;
up1 = frm.FieldB.value;


ds1 = dp1.split('/');
ds2 = up1.split('/');


d1 = new Date();
d2 = new Date();

d1.setFullYear(parseInt(ds1[2],10));
d1.setMonth(parseInt(ds1[1],10)-1);
d1.setDate(parseInt(ds1[0],10));
d1.setHours(0);
d1.setMinutes(0);


d2.setFullYear(parseInt(ds2[2],10));
d2.setMonth(parseInt(ds2[1],10)-1);
d2.setDate(parseInt(ds2[0],10));
d2.setHours(0);
d2.setMinutes(0);


return ( d1.getTime() <= d2.getTime() );
}[</code>]


Which you would call from anywhere in your script like so:


[<code>]if ( checkDateFollows( f.DateA.value, f.DateB.value) ) {
alert("The Date B can't be before Date A");
f.DateB.focus();
return false
}[</code>]


See you soon,
Jake