// kaldes med onsubmit="return isEmail(this)"

              function isEmail(form) {
                var field = form.email;
                var str = field.value;
                if (window.RegExp) {
                  var reg1str = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
                  var reg2str = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$";
                  var reg1 = new RegExp(reg1str);
                  var reg2 = new RegExp(reg2str);
                  if (!reg1.test(str) && reg2.test(str)) {
                    return true;
                  }
                  field.focus();
                  field.select();
					  alert(unescape("Skriv rigtig E-Mail adresse"));	
                  return false;
                } else {
                  if(str.indexOf("@") >= 0)
                    return true;
                  field.focus();
                  field.select();
                  return false;
                }
              }