Javascript validation problem

[mckeegan375]

Hi All

 

Was hoping someone could help me with a little validation problem.

 

On my webpage, i have a form which has two date fields which are made of 3 drop down boxes each (DD, MM and YYYY).

 

I am trying to make it so that a javascript message alert appears if the start date entered is before the end date but im not sure how to do it. Is there a way i can take my 3 date dropdown values and turn them into some kind of date string so that i can them go on to say if startdate > enddate then display the alert box?

 

Any help would be greatly appreciated as i have little knowledge of javascript.

 

Cheers

Andy

[requinix]

You could just compare the parts:

if (start year > end year
|| start year == end year && start month > end month
|| start year == end year  && start month == end month && start day > end day)
{
    // start > end
}

[nogray]

Create new date for each set (var st_dt = new Date(Year, Month, Date); // Month starts from 0 for Jan) and compare the times ( st_dt.getTime() < end_dt.getTime())

 

[mckeegan375]

Thanks for the help guys, i used requinix's solution in the end.

 

Cheers

Andy