Its not working. I don't know regEx, but I need use it.

if ($('input[name="due_date"]').val().match("^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\d\\d$")) {
  $('input[name="due_date"]').after("<span class='v_error'>Must fill</span>");
}

Its not working. I don't know regEx, but I need use it.

if ($('input[name="due_date"]').val().match("^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\d\\d$")) {
  $('input[name="due_date"]').after("<span class='v_error'>Must fill</span>");
}

• javascript
• jquery
• regex
• validation
• date

• Could you be more specific about “not working”? Maybe you just need to insert .value in front of .match? – Christopher Creutzig Commented Aug 24, 2011 at 7:28
• 1 Can i ask why you need to use regex? This is better left to date and not regex. too many corner cases. Check this post out stackoverflow./questions/511439/… – Matt Commented Aug 24, 2011 at 7:30

3 Answers 3

$('input[name="due_date"]').val().match.......

A regex is surrounded with slashes. I just found that your regex is incorrect, too... So, coupled with the jQuery error pointed out by xdazz:

$('input[name="due_date"]').val().match(/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d$/);

The regex is from this website.

You're trying to match with the HTML object, you might add .val() after the jQuery Selector, like

$('input[name="due_date"]').val().match(/^(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\\d\\d$/);