<script type="text/javascript">?? ?var score =80; //score變量存儲(chǔ)成績(jī)，初值為80?? ?if (score>=60) //score>=60及格?? ?{???? document.write("很棒，成績(jī)及格了。");?? ?}??? else? //score<60不及格?? ?{?? ? document.write("加油，成績(jī)不及格。");?? ?}