stopping form submit if the validation fails.

Question

I am validating the dates in below function. If the validation fails, then the form should not get submitted. I tried returning false in form onsubmit but it still gets subm

Answer 1

Just a comment:

If your listener passes a reference to the form, you can access the controls by name or ID:

then:

function dateCheck(form) {
  var start = form.name3.value;
  ...
}

Note that you should declare variables, otherwise they will become global at the point they are assigned to. Also, you should check the values in the controls before passing them to the compare function (and display a message asking the user to enter a valid value if they aren't).

function dateCheck(form) {
  var start = form.name3.value;
  var end = form.name4.value;
  var valid = compare(start, end);

  if (!valid) form.name4.focus();

  return false;
}