function checkId(FORM) {
            id = FORM.id.value; 
            if (id == '' || id == 0) {
                showInvalidDateError();
                return false;
            }
        }
        function changeInfoLink(obj,links,v) {
            if (obj.tagName != 'FORM') {
	        changeInfoLink(obj.parentNode,links,v);
            } else {
                for (i=0, len=obj.getElementsByTagName('a').length; i<len; i++) {
                    if (obj.getElementsByTagName('a')[i].getAttribute('name') == 'infolink') {
                        if (v && v != 0 && v != '') {
                            l = links[v];

                        } else {
                            l = window.location.href;
                        }

                        obj.getElementsByTagName('a')[i].setAttribute('href',l);
//console.log(v,obj.getElementsByTagName('a')[i]);
                        i = len;
                    }
                }
            }
        }
        function checkLink(h) {
            var pattern = /eventinfo/;
            if (!pattern.test(h)) {
                showInvalidDateError();
                return false;
            }
            return true;
        } 
        function showInvalidDateError() {
            if (lang == 'en') {
                alert('You have not selected a valid date or you have selected a Sold Out event.');
            } else {
                alert('Sie haben entweder keinen oder einen ausverkauften Termin ausgewählt.');
            }
        }