var aSelected = new Array('', '', '', '', '', '');
        
        function selectItem(oAnswer) {
            document.getElementById(oAnswer.id.substr(0, 11) + 'a').src = 'img/a_gelb.jpg';
            document.getElementById(oAnswer.id.substr(0, 11) + 'b').src = 'img/b_gelb.jpg';
            document.getElementById(oAnswer.id.substr(0, 11) + 'c').src = 'img/c_gelb.jpg';
            
            oAnswer.src = 'img/' + oAnswer.id.substr(11, 1) + '_gruen.jpg';
            
            aSelected[oAnswer.id.substr(9, 1)] = oAnswer.id.substr(11, 1);
        }
        
        function highlightItem(oAnswer) {
            if (oAnswer.src.indexOf('gruen') == -1) oAnswer.src = 'img/' + oAnswer.id.substr(11, 1) + '_rot.jpg';
        }
        
        function normalizeItem(oAnswer) {
            if (oAnswer.src.indexOf('gruen') == -1) oAnswer.src = 'img/' + oAnswer.id.substr(11, 1) + '_gelb.jpg';
        }
        
        function calcResult() {
            var iCountA = 0;
            var iCountBC = 0;
            var bErr = false;
            
            for (var iI = 1; iI <= 5; iI++) {
                if (aSelected[iI] == '') {
                    bErr = true;
                }
                else {
                    if (aSelected[iI] == 'a') {
                        iCountA++;
                    }
                    else {
                        iCountBC++;
                    }
                }
            }
            
            if (bErr) {
                alert('Bitte alle Fragen beantworten!');
            }
            else if (iCountA > iCountBC) {
                window.location.href = 'ergebnis_a.html';
            }
            else {
                window.location.href = 'ergebnis_b.html';
            }
        }