Collection of useful jquery.validate methods.

jquery.validate.custom-methods.js

$.validator.addMethod("dateGreaterThan", function(value, element, params) {
	
	var start	= moment($(params).val(), "DD/MM/YYYY");
	var end 	= moment(value, "DD/MM/YYYY");
	
  return end.diff(start) >= 0;
}, "End date must be greater than start one.");

$.validator.addMethod("isValidDate_pt_BR", function(value, element) {
  return moment(value, "DD/MM/YYYY").isValid();
}, "Invalid date");