document.getElementById('checkZodiac').addEventListener('click', function() {
                const resultDiv = document.getElementById('result');
                resultDiv.style.display= 'block'; //hien thi khung ket qua
                resultDiv.innerHTML = '<div class= "waiting">Dang cho lay thong tin..</div> ';
                const birthdate = new Date (document.getElementById('birthdate').value);
                const month = birthdate.getMoth() +1 ; //thang(0-11)
                const day =birthdate.getDate();
                const name = document.getElementById('name').value.trim();

                const zodiac = getZodiacSign(month, day);
                const details = getZodiacDetails(zodiac,name);

                //hien thi ket qua khi co tt
                resultDiv.innerHTML = 'Chao ban <span class="name">${name}</span>\n\n' +details ;
                document.getElementById('share').style.display = 'block' ; //hien thi nut chia se