а если вот так, допустим, получаете innerHTML таблицы, а затем
s=' <tr class="Details" id="1_14" data-id="14" data-currency="1"> <td># 1</td> <td><span class="HiPart">98 <span class="MiddlePart">76</span> <span class="LowPart">00</span>....'
re=/>\d+/g
alert(s.match(re).join("").split(">").join(" "))
// 98 76 00
или
s=' <tr class="Details" id="1_14" data-id="14" data-currency="1"> <td># 1</td> <td><span class="HiPart">98 <span class="MiddlePart">76</span> <span class="LowPart">00</span>....'
alert(s.split(/>(\d+)/).filter(function(el){return /^\d+$/.test(el)}))
// [ '98', '76', '00' ]