Code <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html> <head> <title>Bad Words Example</title> <script type="text/javascript">
function filterText(sText) { var reBadWords =/badword|anotherbadword/gi; return sText.replace(reBadWords, function (sMatch) { return sMatch.replace(/./g, "*");
});
}
function showText() { var oInput1 = document.getElementById("txt1"); var oInput2 = document.getElementById("txt2");
oInput2.value = filterText(oInput1.value);
} </script> </head> <body> <p>Enter some text below including "badword" and "anotherbadword", and click the button<br /> <textarea rows="10" cols="50" id="txt1"></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>