<TH ALIGN="right">Payment amount</TH>
<TD COLSPAN=7>
<TABLE><TR><TD BGCOLOR="#ffffff">
- $<INPUT TYPE="text" NAME="amount" SIZE=8 VALUE="<%=sprintf("%.2f",$balance)%>">
+<%=
+ $amt = '';
+ $amt = sprintf("%.2f",$balance) if $balance > 0;
+ '';
+%>
+ $<INPUT TYPE="text" NAME="amount" SIZE=8 VALUE="<%=$amt%>">
</TD></TR></TABLE>
</TD>
</TR>