Buscador avanzado

[Faser]

Son datos que hay que buscar en base de batos.
el codigo es el siguiente...

Código PHP:

 <form action="<? echo $PHP_SELF ?>" method="post"> 
<table width="100%" height="80%"  border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="#FFFFFF" class="menu-text"> 
                <tr> 
                  <td align="right" valign="top" class="menu-text"><div align="right"></div></td> 
                  <td><div align="right">Buscar palabra: </div></td> 
                <td><input name="nombre" type="text" class="input" size="20" vale"<?php echo "$nombre";?>"> </td> 
                </tr> 
                <tr> 
                  <td colspan="3" class="menu-text"><div align="center">&nbsp; 
                  </div></td> 
                </tr> 
                <tr> 
                  <td height="10" colspan="3" align="right" valign="top" class="topictext"></td> 
                </tr> 
                <tr> 
                  <td align="right" class="menu-text">&nbsp;</td> 
                  <td><div align="right">Poblaci&oacute;n:</div></td> 
                  <td><select class="input" name="poblacion"> 
                    <option selected>Seleccionar Poblaci&oacute;n</option> 
                    <option></option> 
                    <? 
        $result = mysql_query("SELECT * FROM jcm_poblacion order by nombre"); 
        while($row = mysql_fetch_row($result)) { 
    ?> 
                    <option value="<?php echo $row[id]; ?>"><?php echo $row[poblacion]; ?></option> 
                    <?php 
                    } 
                    ?> 
                  </select></td> 
                  </tr> 
                <tr> 
                  <td align="right" class="menu-text">&nbsp;</td> 
                  <td><div align="right">Tipo de Inmueble:</div></td> 
                  <td><select class="input" name="tipoinmueble"> 
                    <option selected>Seleccionar Inmueble</option> 
                    <option></option> 
                    <? 
                    $result = mysql_query("SELECT * FROM jcm_tipoinmueble"); 
                    while($row = mysql_fetch_row($result)) { 
                    ?> 
                    <option value="<?php echo $row[id]; ?>"><?php echo $row[tipoinmueble]; ?></option> 
                    <?php 
                    } 
                    ?> 
                  </select></td> 
                  </tr> 
                <tr> 
                  <td align="right" class="menu-text">&nbsp;</td> 
                  <td><div align="right">Tipo de Operaci&oacute;n:</div></td> 
                  <td><select class="input" name="tipooperacion"> 
                    <option selected>Seleccionar Operaci&oacute;n</option> 
                    <option></option> 
                    <? 
                    $result = mysql_query("SELECT * FROM jcm_tipooperacion"); 
                    while($row = mysql_fetch_row($result)) { 
                    ?> 
                    <option value="<?php echo $row[id]; ?>"><?php echo $row[tipooperacion]; ?></option> 
                    <?php 
                    } 
                    ?> 
                  </select></td> 
                  </tr> 
                <tr> 
                  <td height="10" colspan="3" align="right" class="topictext"></td> 
                </tr> 
                <tr> 
                  <td align="right" class="menu-text">&nbsp;</td> 
                  <td><div align="right">Precio:</div></td> 
                <td><input name="precio" type="text" class="precio" size="30"> 
                  &euro; </td> 
                </tr> 
                <tr> 
                  <td align="right" class="menu-text">&nbsp;</td> 
                  <td colspan="2"><div align="center"> 
                    <input name="enviado" type="submit" id="enviado" value="Buscar"> 
                  </div></td> 
                </tr> 
              </table> 
</form>  

el problema es cuando lo recibo que solo me busca en el campo $nombre