敏感词过滤

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <style>
            *{
                margin: 0;
                padding: 0;
                padding: 10px;
            }
            .box{
                width: 220px;
                height: 200px;
                border: 1px solid #808080;
            }
        </style>
        <script type="text/javascript">
            window.onload = function(){
                //获取div
                var odiv = document.getElementsByTagName("div")[0];
                //获取文本框的内容
                var iptValue = document.getElementsByTagName("textarea")[0];
                //获取按钮
                var btn = document.getElementsByTagName("button")[0];
                btn.onclick = function(){
                    Value = iptValue.value;
                    //将value过滤
                    var reg = /王德发|妈的|草|尼玛/g;
                    //将匹配到的值替换为*
                    var res = Value.replace(reg,"*");
                    //将插入的值添加到div种
                    odiv.innerHTML = res;
                }
            }
        </script>
    </head>
    <body>
        <h2>敏感词过滤</h2>
        <textarea rows="10" cols="30"></textarea>
        <br>
        <button type="button">发布</button>
        <div class="box"></div>
    </body>
</html>