單機按鈕票數加一，用total.innerHTML = parseInt(total.innerHTML) + 1可以，但要是用var num = total.innerHTML 把total.innerHTML 都替換掉就不行，為什么
<script>
????????function vote(e){
????????????var total = document.getElementById("total");
????????????var num = total.innerHTML;
????????????num = parseInt(num)+1; ????????//這樣就沒效果
????????}
</script>
2016-01-22
你沒把num賦值給total.innerHTML當然沒效果了