Later than a set date

[Ben]

Hey Alexis,

Thanks for the reminder about this post.

So! Here's some very general pointers on how to do this for the JS RSV script. Since the built-in date validation code is pretty basic, we're going to bypass it altogether and write a custom function to do the validation for us. First, add a new rule to your rule list: this will call your custom function.

Code:

rules.push("function,check_date");

Next, as you described in your post, the check_date() function needs to do a couple of things. I wasn't completely sure about the rules you need to check for, but here's an example of how it would look:

Code:

function check_date() {
  // this bit would be generated server-side. This example assumes you're using PHP and the
  // date is in yyyy-mm-dd format.
  var study_date_start = "<?=$study_date_start?>";

  // 1. find the form fields that contain the dates.

  // 2. do whatever tests you want. You'd no doubt compare it with the value in study_date_start

  // 3. if there are errors, return a variable like this - where problem_field is a reference to
  // the form field that has a problem (e.g. document.getElementById("field1") )
  // return [[problem_field, "your error message"]];

  // if there are no error messages, return true:
  return true;
}

That's the gist of it... the validation logic will be the next bit to sort out. Basically you'd need to extract & compare the various dates and do the math on them.

Sorry I'm being so general, but hopefully this gives you some idea of how to proceed - at least how to plug it into the main validation control flow.

- Ben