????:<script type="text/javascript">var x=5;var y=7;document write(x+y);//顯示12<script>
<script type="text/javascript">
var x=5;
var y=7;
document write(x+y);//顯示12
<script>
?? ???:滅絕師太?? ??:2019-01-06 09:27:12
???? ??:定義變量的注意事項(xiàng)要搞搞清楚喲!基礎(chǔ)的知識(shí)點(diǎn)比較重要!