Si, tienes razon, aqui pongo el codigo por si sirve de algo. Estoy usando DIV's y Tablas:
Código HTML:
<form name="frmFilter" onSubmit="return (valida(this) && validacion3(this))" action="<?php echo $site_secure_URL;?>results.php" method="get">
<div align="left" style="margin-top:5px; font-family:Arial, Helvetica, sans-serif; font-size:15px; color:#827F7F; font-weight:bold;"> <img src="images/triangulito3.gif" width="10" height="10" /> Find Best Prices:</div><table width="670" border="0" align="center" style="border-collapse:collapse">
<tr>
<td style="width:1px"> </td><td align="left" valign="middle"><select name="model" class="bordesolid1" onChange="setOptions(document.forms['frmFilter'].type,this.options[this.selectedIndex].value,' All Models '); setCars(document.forms['frmFilter'].cars,document.forms['frmFilter'].model.options[document.forms['frmFilter'].model.selectedIndex].value,document.forms['frmFilter'].type.options[document.forms['frmFilter'].type.selectedIndex].value,document.forms['frmFilter'].price.options[document.forms['frmFilter'].price.selectedIndex].value);" style="width:150px">
<option value="" selected="selected" class="bordesolid1">All Makes</option>
<?php while($row = mysql_fetch_array($rsModel)){ ?>
<option value="<? echo $row["model"] ?>"><? echo $row["model"] ?></option>
<?php } ?>
</select> </td>
<td align="left" valign="middle"> <select name="min_price" class="bordesolid1" style="width:100px">
<option value="">Min Price</option>
<option value="0">0</option>
<option value="5000">$5,000</option>
<option value="10000">$10,000</option>
<option value="15000">$15,000</option>
<option value="20000">$20,000</option>
<option value="25000">$25,000</option>
<option value="30000">$30,000</option>
<option value="35000">$35,000</option>
<option value="40000">$40,000</option>
<option value="45000">$45,000</option>
<option value="50000">$50,000</option>
<option value="55000">$55,000</option>
<option value="60000">$60,000</option>
<option value="65000">$65,000</option>
<option value="70000">$70,000</option>
<option value="75000">$75,000</option>
<option value="80000">$80,000</option>
<option value="85000">$85,000</option>
<option value="90000">$90,000</option>
<option value="95000">$95,000</option>
<option value="100000">$100,000</option>
</select></td>
<td align="left" valign="middle"><select name="min_year" class="bordesolid1" style="width:100px">
<option value="">Min Year</option>
<?php for($yearCnt=date("Y"); $yearCnt>=date("Y")-25;$yearCnt--){ ?>
<option value="<? echo $yearCnt ?>"><? echo $yearCnt ?></option>
<?php } ?>
</select></td>
<td align="right" valign="middle">City:
<input name="city" type="text" class="bordesolid1" style="width:136px" value="" /></td><td rowspan="2" align="left"valign="middle" style="width:20px"> </td>
<td rowspan="2" align="left" valign="middle"><input name="submit" type="submit" style="font-size:12px; font-weight: bold; font-family:Arial, Helvetica, sans-serif; color:#FFFFFF; border-width:1px; background-color:#FF6600; border-color:#E85C00" value="Search" /></td>
</tr>
<tr>
<td style="width:1px"> </td>
<td align="left" valign="middle"> <select name="type" class="box" style="width: 150px; border: 1px solid #C5C5C5; onchange="setCars(document.forms['frmFilter'].cars,document.forms['frmFilter'].model.options[document.forms['frmFilter'].model.selectedIndex].value,document.forms['frmFilter'].type.options[document.forms['frmFilter'].type.selectedIndex].value,document.forms['frmFilter'].price.options[document.forms['frmFilter'].price.selectedIndex].value)";">
<option value="">All Models</option>
</select>
<script type="text/javascript" language="JavaScript">
<?
echo "var type = new Array();\r\n" ;
while($row = mysql_fetch_array($rsType))
echo "type[type.length]= new Array('".str_replace("'","\'",$row["type"])."','".str_replace("'","\'",str_replace($search_model_drop_down_array,$search_model_drop_down_out_array,$row["type"]))."','".str_replace("'","\'",$row["model"])."');\n";
?>
</script>
<select name="cars" class="box" style="display:none; width:150px">
<option value="">Model</option>
</select>
<script type="text/javascript" language="JavaScript">
<?
echo "var cars = new Array();\r\n" ;
while($row = mysql_fetch_array($rsCars))
echo "cars[cars.length]= new Array('".$row["id"]."','".str_replace("'","\'",$row["model"])."','".str_replace("'","\'",$row["type"])."',".$row["price"].");\n";
?>
</script></td>
<td align="left" valign="middle"> <select name="max_price" class="bordesolid1" style="width:100px">
<option value="">Max Price</option>
<option value="100000">$100,000</option>
<option value="95000">$95,000</option>
<option value="90000">$90,000</option>
<option value="85000">$85,000</option>
<option value="80000">$80,000</option>
<option value="75000">$75,000</option>
<option value="70000">$70,000</option>
<option value="65000">$65,000</option>
<option value="60000">$60,000</option>
<option value="55000">$55,000</option>
<option value="50000">$50,000</option>
<option value="45000">$45,000</option>
<option value="40000">$40,000</option>
<option value="35000">$35,000</option>
<option value="30000">$30,000</option>
<option value="25000">$25,000</option>
<option value="20000">$20,000</option>
<option value="15000">$15,000</option>
<option value="10000">$10,000</option>
<option value="5000">$5,000</option>
<option value="0">0</option>
</select></td>
<td align="left" valign="middle"><select name="max_year" class="bordesolid1" style="width:100px">
<option value="">Max Year</option>
<?php for($yearCnt=date("Y"); $yearCnt>=date("Y")-25;$yearCnt--){ ?>
<option value="<? echo $yearCnt ?>"><? echo $yearCnt ?></option>
<?php } ?>
</select></td>
<td align="right" valign="middle">
<!-- Within <input name="ziprange" type="text" class="bordesolid1" style="width: 20px" value="" maxlength="3" /> -->
<img src="images/triangulito.gif" border="0"/> Your ZIP Code: <input name="zip" type="text" class="bordesolid1" style="width:50px" value="" maxlength="5" /></td>
</tr>
</table>
<table border="0" style="border-collapse:collapse" width="670">
<tr>
<td style="width:1px"> </td><td align="left"><input name="keyword" type="text" class="bordesolid1" style="width:148px" value="" />
<strong><span style="color:#827F7F;"><img src="images/triangulito.gif" border="0"/> Features</span></strong> (i.e. Leather, Air, Sunroof, etc.)</td>
<td align="right"> </td>
</tr></table>
</form>