11.2.6 ceil方法.html

javascript即用即差核心对象手册

<script>
   with(document)
   {
      with(Math)
      {
        write("ceil(-2.5)="+ceil(-2.5));
        write("<br>ceil(2)="+ceil(2));
        write("<br>ceil(2.5)="+ceil(2.5));
      }
   }
</script>