JavaScript实现页面敏感词自动屏蔽功能

<html>
<head>
 <title>Bad Words Example</title>
 <script type="text/javascript">
   function filterText(sText) {
    var reBadWords = /badword|anotherbadword/gi;
    return sText.replace(reBadWords, "****");
   }
   function showText() {
    var oInput1 = document.getElementById("txt1");
    var oInput2 = document.getElementById("txt2");
    oInput2.value = filterText(oInput1.value);
   }
 </script>
</head>
<body>
 <P>
 <textarea rows="10" cols="50" id="txt1">badword anotherbadword</textarea><br />
 <input type="button" value="Filter Bad Words" onclick="showText()" /></p>
 <P>Filtered Text:<br />
 <textarea rows="10" cols="50" id="txt2"></textarea></p>
</body>
</html>