過濾Html的函數

//過濾Html的函數
public string checkStr(string html)
{
    System.Text.RegularExpressions.Regex regex1 =
        new System.Text.RegularExpressions.Regex(@"<script[\s\S]+</script *>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex2 =
        new System.Text.RegularExpressions.Regex(@" href *= *[\s\S]*script *:",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex3 =
        new System.Text.RegularExpressions.Regex(@" no[\s\S]*=",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex4 =
        new System.Text.RegularExpressions.Regex(@"<iframe[\s\S]+</iframe *>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex5 =
        new System.Text.RegularExpressions.Regex(@"<frameset[\s\S]+</frameset *>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex6 =
                new System.Text.RegularExpressions.Regex(@"\<img[^\>]+\>",
                    System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex7 =
        new System.Text.RegularExpressions.Regex(@"</p>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex8 =
        new System.Text.RegularExpressions.Regex(@"<p>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    System.Text.RegularExpressions.Regex regex9 =
        new System.Text.RegularExpressions.Regex(@"<[^>]*>",
            System.Text.RegularExpressions.RegexOptions.IgnoreCase);
    html = regex1.Replace(html, ""); //過濾<script></script>標記
    html = regex2.Replace(html, ""); //過濾href=javascript: (<A>) 屬性
    html = regex3.Replace(html, " _disibledevent="); //過濾其它控件的on...事件
    html = regex4.Replace(html, ""); //過濾iframe
    html = regex5.Replace(html, ""); //過濾frameset
    html = regex6.Replace(html, ""); //過濾frameset
    html = regex7.Replace(html, ""); //過濾frameset
    html = regex8.Replace(html, ""); //過濾frameset
    html = regex9.Replace(html, "");
    html = html.Replace(" ", "");
    html = html.Replace("</strong>", "");
    html = html.Replace("<strong>", "");
    return html;
} 

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