function checkLoginTitle(fm){ if(fm.username.value == ''){ alert("请输入您的用户名!"); fm.username.focus(); return false; } if(fm.password.value == ''){ alert("请输入您的密码!"); fm.password.focus(); return false; } fm.url.value = location.href; return true; } with(document){ writeln(''); writeln(''); writeln(''); writeln(''); writeln(''); writeln('
用户名:'); writeln(' 密码:'); writeln(' 用户注册'); writeln(''); writeln('首  页│'); writeln('加入收藏'); writeln('
'); }