Mantener texto en textbox dentro de frame?

[CWeeD]

Código HTML:

<form name="searchfield" method="get"><label for="texto"></label>
<label for="texto">
<input name="texto" type="text" class="bar" id="texto" onkeydown="if (event.keycode == 13) javascript:valida()" size="57"maxlength="2048" autocomplete="on" action="text.php" />
  <input type="submit" name="q" id="q" class="boton" value="Search" onclick="javascript:valida()"/>
  </label> 
  <p>
    <span class="title">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Choose engine</span> 
<!--Combos -->
    <select name="SE1" onchange="setEngines(this)">
    <option value="" selected>Choose First:</option>
    <option value="http://www.ebay.com/search?q=">ebay</option>
    <option value="http://www.amazon.com/search?p=">amazon</option>
    </select>&amp;
<select name="SE2">
    <option value="" selected>Choose Second:</option>
</select>
</form> 

Aqui esta...