个回答

• LCchao

  2016-05-15 18:23:37

  已采纳

  <script type="text/javascript">

    var score=80;

   if(score>=60&&score<=70){document.write("恭喜及格了");}

   else if(score>=80){document.write("优秀");}

   else{document.write("无");}

    </script>

  ;位置错误

  0