// Validate the add an event form.

        // Declaring required variables

        var digits = "0123456789";

        // non-digit characters which are allowed in phone numbers

        var phoneNumberDelimiters = "()- ";

        // characters which are allowed in international phone numbers

        // (a leading + is OK)

        var validWorldPhoneChars = phoneNumberDelimiters + "+";

        // Minimum no of digits in an international phone no.

        var minDigitsInIPhoneNumber = 10;



        function isInteger(s){

            var i;

            for (i = 0; i < s.length; i++){   

                // Check that current character is number.

                var c = s.charAt(i);

                if (((c < "0") || (c > "9"))) return false;

            }

            // All characters are numbers.

            return true;

        }



        function stripCharsInBag(s, bag){

            var i;

            var returnString = "";

            // Search through strings characters one by one.

            // If character is not in bag, append to returnString.

            for (i = 0; i < s.length; i++){   

                var c = s.charAt(i);

                if (bag.indexOf(c) == -1) returnString += c;

            }

            return returnString;

        }



        function isInternationalPhone(strPhone){

            s=stripCharsInBag(strPhone,validWorldPhoneChars);

            return (isInteger(s) && s.length >= minDigitsInIPhoneNumber);

        }

       

        function checkPhone(nm){

            if (isInternationalPhone(nm.value)==false){

                nm.focus()

                alert("This is not a valid phone number. Please try again.")

                return false

            }

            return true

        }

        

        function checkCat(cat){

          if (cat.value==""){

             cat.focus()

             alert("Please select the event category type")

             return false

          }

          return true;

        }

        

        function checkLocation(loc){

          if (loc.value==""){

             loc.focus()

             alert("Please enter the location of the event")

             return false

          }

          return true;

        }

        

        function checkTown(town){

          if (town.value==""){

             town.focus()

             alert("Please select the town where the event is to take place.")

             return false

          }

          return true;

        }

        

        function checkEmail(email){

          if (town.value==""){

             town.focus()

             alert("Please select the town where the event is to take place.")

             return false

          }

          return true;

        }

        

        function checkEmail(email){

		  var email1 = /^[^@]+@[^@.]+\.[^@]*\w\w$/  ;

		  var email2 = /^[A-Za-z][\w.-]+@\w[\w.-]+\.[\w.-]*[A-Za-z][A-Za-z]$/  ;

	      

	      if(email.value.length > 0){

		    if (!email1.test(email.value)) {

		      email.focus()

		      alert ("ERROR: not a valid e-mail address");

		      return false;

		    }



		    if (!email2.test(email.value)){

              email.focus()

		      alert ("Unusual e-mail address - check if correct");

		      return false;

		    }else{

		      return true;

		    }

		  }

		}

//]]>