Cannot get jQuery validation to work with MM/DD/YYYY - regex

Question

I have a custom regex method:
$.validator.addMethod(
"dateRegex",
function(value, element, regexp) {
var re = new RegExp(regexp);
return this.optional(element) || re.test(value);
},
"Date must be in the format MM/DD/YYYY"
);
I've got jQuery validation on a date field that looks like this:
rules:
date:
{
required: true,
dateRegex: '^(0[1-9]|1[012])[- //.](0[1-9]|[12][0-9]|3[01])[- //.](19|20)\d\d$',
maxlength: 10
}
}
messages: {
lossDate: {
required: "Unable to proceed, search field is empty"
}
}
When I enter a valid date, for example 08/06/2013, "Date must be in the format MM/DD/YYYY" is displayed. Does anyone see a mistake in my regex, or is the problem outside of that?
The test data passes here: http://regexpal.com/
Also, I have the following working in my app:
$.validator.addMethod(
"regex",
function(value, element, regexp) {
var re = new RegExp(regexp);
return this.optional(element) || re.test(value);
},
"Invalid number of characters entered."
);
number:
{
required: true,
regex: '^(.{7}|.{9}|.{11}|.{12}|.{15})$'
},...

Answer 1

I guess that plugin doesn't want strings for regexes. Instead of a string literal, put a regex literal:
…,
dateRegex: /^(0[1-9]|1[012])[- \/.](0[1-9]|[12][0-9]|3[01])[- \/.](19|20)\d\d$/,
…
You also can simplify the function then:
function(value, element, regexp) {
return this.optional(element) || regexp.test(value);
}