如果用戶輸入了http://aaa.bbb.ccc
下面這個代碼將把他的輸入轉換成http://aaa.bbb.ccc
大家看看正則表達式有多厲害，呵呵。

<%
    '調用這個函數來顯示成超聯結
    Response.Write to_html(s_message)
%>


<%
Function to_html(s_string)
    to_html = Replace(s_string, """", "&quot;")
    to_html = Replace(to_html, "<", "&lt;")
    to_html = Replace(to_html, ">", "&gt;")
    to_html = Replace(to_html, vbcrlf, "<br>")
    to_html = Replace(to_html, "/&lt;", "<")
    to_html = Replace(to_html, "/&gt;", ">")
    to_html = edit_hrefs(to_html)
End Function
%>

<script language="javascript1.2" runat=server>
function edit_hrefs(s_html){
    // 一個使用正則表達式的典范
    // 轉換文本中所有的超聯結和電子郵件格式
    s_str = new String(s_html);

    s_str = s_str.replace(/\bhttp\:\/\/www(\.[\w+\.\:\/\_]+)/gi,
        "http\:\/\/&not;¤&cedil;$1");

    s_str = s_str.replace(/\b(http\:\/\/\w+\.[\w+\.\:\/\_]+)/gi,
        "<a href=\"$1\">$1<\/a>");
        
    s_str = s_str.replace(/\b(www\.[\w+\.\:\/\_]+)/gi,
        "<a href=\"http://$1\">$1</a>");
        
    s_str = s_str.replace(/\bhttp\:\/\/&not;¤&cedil;(\.[\w+\.\:\/\_]+)/gi,
        "<a href=\"http\:\/\/www$1\">http\:\/\/www$1</a>");
        
    s_str = s_str.replace(/\b(\w+@[\w+\.?]*)/gi,
        "<a href=\"mailto\:$1\">$1</a>");
        
    
    return s_str;
}
</script>