Best Way to extract Numbers from String

[Jimbo]

Hello

I am trying to grab some numbers from a string containing HTML text.
Can you suggest any good functions that I could use to do this? What
would be the easiest way to extract the following numbers from this
string...

My String has this layout & I have commented what I want to grab:
[CODE] """</th>
                                <td class="last">43.200 </td>
                                <td class="change indicator" nowrap>0.040 </td>

                                                   <td>43.150 </td> #
I need to grab this number only
                                <td>43.200 </td>
                                                   <td>43.130 </td> #
I need to grab this number only
                                <td>43.290 </td>                                
             <td>43.100 </td> # I need to
grab this number only
                                <td>7,450,447 </td>
                                <td class="middle"><a
                                        href="/asx/markets/optionPrices.do?
by=underlyingCode&underlyingCode=BHP&expiryDate=&optionType=">Options</
a></td>
                                <td class="middle"><a
                                        href="/asx/markets/warrantPrices.do?
by=underlyingAsxCode&underlyingCode=BHP">Warrants &amp; Structured
Products</a></td>
                                <td class="middle"><a
                                        href="/asx/markets/cfdPrices.do?
by=underlyingAsxCode&underlyingCode=BHP">CFDs</a></td>
                                <td class="middle"><a 
href="http://hfgapps.hubb.com/asxtools/
Charts.aspx?
TimeFrame=D6&amp;compare=comp_index&amp;indicies=XJO&amp;pma1=20&amp;pma2=20&amp;asxCode=BHP"><img
src="/images/chart.gif" border="0" height="15" width="15"></a>
</td>
                                <td><a 
href="/research/announcements/status_notes.htm#XD">XD</a>
                                </td>
                                <td><a href="/asx/statistics/announcements.do?
by=asxCode&asxCode=BHP&timeframe=D&period=W">Recent</a>
</td>
                        </tr>"""[/CODE]
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