为什么我的第二行的document内容不显示
<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>document.write</title> <script type="text/javascript"> var mystr="我是"; var mychar="JavaScript"; document.write(mystr+"<br>"); document.write(mychar+"的忠实粉丝"); </script> </head> <body> </body> </html>