你的asp默认的是什么语句。
如果是vbscript 
  应该为:username=Request.form("username")+""
          var password=Request.form("password")+""
          confirmcode=Request.form("confirmcode")+""
          call check_len(username,"[用户名]",10,1)
          call check_len(password,"[密码]",16,0)
          call iserror()
如果是javascript
  应该为:username=Request.form("username")+"";
          var password=Request.form("password")+"";
          confirmcode=Request.form("confirmcode")+"";
          check_len(username,"[用户名]",10,1);
          check_len(password,"[密码]",16,0);
          iserror();