i am soo stuck! need help with a form

[jeger003]

hello,

i have a simple search on my php site that does not have a button. its two fields.....one you can search by title and the other you can search by ISBN....my problem is since it doesnt have a button it wont work on a mobile phone (i tried it).

 

how can i combine them but have them do two different things

 

<table width="100%" height="100%" border="0" cellpadding="0" cellspacing="5" bgcolor="#FFFFFF">
  <tr>
    <td height="79"><table width="504" border="0" align="left" cellpadding="0" cellspacing="0">
  <tr>
    <td nowrap class="search_bar_text_title">Book Title:</td>
    <td width="417"><form action='/index.php?a=28&b=145&search=100' method='post' class="search_bar_text_font">
<input name='szs' type='text' style="color: #999999; font-size: 12px;" onFocus="if (value == 'Enter Title ') {value=''; style.color='#000'; }" value="Enter Title" size="60" maxlength="50" />
</form></td>
  </tr>
    <tr>
    <td nowrap class="search_bar_text_title">Book ISBN:</td>
    <td width="417"><form action='/index.php?a=28&b=145&search=200' method='post' class="search_bar_text_font">
<input name='isb' type='text' style="color: #999999; font-size: 12px;" onFocus="if (value == 'Search ISBN') {value=''; style.color='#000'; }" value="Search ISBN" size="60" maxlength="50" />
</form></td>
  </tr>
</table></td>
  </tr>
        </table>