Subtract values in two textboxes in listview row
<p>Sorry about that... I am using an ASP.NET listview that can have one or many rows.  Here is the HTML that is generated for the listview itself.  I want to be able to subtract the two INPUTS named txtAmount and txtPayAmt from one another so that I can message the customer if they are getting ready to pay on an account that already has a zero balance.</p>

<p>Thanks for any help you can provide.</p>

<pre><code>&lt;DIV style="Z-INDEX: 590" id=divBTUAccts&gt;
    &lt;TABLE style="BORDER-BOTTOM: #cc9966 1px solid; BORDER-LEFT: #cc9966 1px solid; BACKGROUND-COLOR: white; WIDTH: 100%; FONT-FAMILY: Arial; FONT-SIZE: 9pt; BORDER-TOP: #cc9966 1px solid; BORDER-RIGHT: #cc9966 1px solid" cellSpacing=0 cellPadding=4&gt;
        &lt;TBODY&gt;
            &lt;TR class=AccountTableHeader&gt;
                &lt;TH&gt;&amp;nbsp; &lt;/TH&gt;
                &lt;TH&gt;Account / Address &lt;/TH&gt;
                &lt;TH&gt;Due Date &lt;/TH&gt;
                &lt;TH&gt;Payment Amount &lt;/TH&gt;
                &lt;TH&gt;Recurring? &lt;/TH&gt;
            &lt;/TR&gt;
            &lt;TR class=MainRowColor&gt;
                &lt;TD&gt;&lt;INPUT id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_chkAccount CHECKED type=checkbox name=ctl00$ctl00$ContentPlaceHolderBody_BTUWeb$ContentPlaceHolder_CenterColumn$ListView_Accounts$ctrl0$chkAccount&gt; &lt;/TD&gt;
                &lt;TD&gt;&lt;SPAN id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_lblAcct&gt;2116280&lt;/SPAN&gt;&amp;nbsp;-&amp;nbsp; &lt;SPAN id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_lblAddr&gt;16177 WOODLAKE DR&lt;/SPAN&gt; &lt;/TD&gt;
                &lt;TD style="TEXT-ALIGN: center"&gt;&lt;SPAN id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_lblDueDt&gt;05/25/2011&lt;/SPAN&gt; &lt;/TD&gt;
                &lt;TD style="TEXT-ALIGN: right"&gt;&lt;SPAN id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_lblDollar&gt;$&lt;/SPAN&gt; &lt;INPUT style="TEXT-ALIGN: right" id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_txtAmount value=10.00 type=text name=ctl00$ctl00$ContentPlaceHolderBody_BTUWeb$ContentPlaceHolder_CenterColumn$ListView_Accounts$ctrl0$txtAmount {95919BE0-C436-4eab-8083-096E94826667}="10.00"&gt; &lt;/TD&gt;
                &lt;TD&gt;&lt;/TD&gt;
                &lt;TD style="DISPLAY: none"&gt;&lt;INPUT style="DISPLAY: none" id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_ListView_Accounts_ctrl0_txtAmtDue value=0 type=text name=ctl00$ctl00$ContentPlaceHolderBody_BTUWeb$ContentPlaceHolder_CenterColumn$ListView_Accounts$ctrl0$txtAmtDue {95919BE0-C436-4eab-8083-096E94826667}="0"&gt; &lt;/TD&gt;
            &lt;/TR&gt;
            &lt;TR class=AccountTableFooter&gt;
                &lt;TD&gt;&amp;nbsp; &lt;/TD&gt;
                &lt;TD&gt;&amp;nbsp; &lt;/TD&gt;
                &lt;TD&gt;&amp;nbsp; &lt;/TD&gt;
                &lt;TD style="TEXT-ALIGN: right"&gt;&amp;nbsp; &lt;/TD&gt;
                &lt;TD&gt;&amp;nbsp; &lt;/TD&gt;
            &lt;/TR&gt;&lt;!--End of ListView_Accounts--&gt;
            &lt;TR class=AccountTablePager align=middle&gt;
                &lt;TD colSpan=5&gt;&lt;SPAN id=ctl00_ctl00_ContentPlaceHolderBody_BTUWeb_ContentPlaceHolder_CenterColumn_DataPager1&gt;&lt;SPAN&gt;1&lt;/SPAN&gt;&amp;nbsp;&lt;/SPAN&gt; &lt;/TD&gt;
            &lt;/TR&gt;
        &lt;/TBODY&gt;
    &lt;/TABLE&gt;
&lt;/DIV&gt;
</code></pre>

<p>I am new to using jQuery and so I throw myself on the mercy of you developers out there for help on this problem.  I need to iterate through one or many rows in a listview all the while subtracting the amount in one textbox in the row from another.  I have been trying to figure this out for a day now with no luck.  Please help!</p>
