สอบถามการทำ list Menu เช่นมี 4 list ให้ผู้ใช้เลือก list 1-3 และ list 4 จะใช้list 1-3 เป็นเงื่อนไขในการหาข้อมูล

<td width="19" bgcolor="#D5D3D3">No.</td>
                                  <td width="177" bgcolor="#D5D3D3">รายละเอียดของรถ</td>
                                  <td width="204" bgcolor="#D5D3D3">Select Car For Sell</td>
                                  <td width="200" bgcolor="#D5D3D3">Select Car For Buy</td>
                                </tr>
                                <tr bgcolor="#B5FFF4">
                                  <td>1</td>
                                  <td>สถานะรถ</td>
                                  <td><select name='car0' id='car0' onChange="data_show(this.value,'car1','');" class="textbox">
                                    <option value="">--- เลือกรุ่น ---</option>
                                  <option value="Stock">--- Stock ---</option>
                                    </option>
                                  
                                  </select></td>
                                  <td><select name='car21' id='car21' onChange="data_show(this.value,'car22','');" class="textbox">
                                    <option value="">--- เลือกรุ่น ---</option>
                                    <option value="Stock">--- Stock ---</option>
                                    </option>
                                  </select></td>
                                </tr>
                                <tr bgcolor="#CCF5AB">
                                  <td>2</td>
                                  <td>รุ่นรถ</td>
                                  <td><select name='car1' id='car1' onChange="data_show(this.value,'car2','');" class="textbox">
                                    <option value="">--- เลือกรุ่น ---</option>
                                    <?php
			  
		$rstTemp=mysql_query('select * from modelcar Order By idmodelcar ASC');
		while($arr_2=mysql_fetch_array($rstTemp)){
		?>
                                    <option value="<?=$arr_2['idmodelcar']?>">
                                      <?=$arr_2['namemodelcar']?>
                                    </option>
                                    <?php }?>
                                  </select></td>
                                  <td><select name='car22' id='car22' onChange="data_show(this.value,'car23','');" class="textbox">
                                    <option value="">--- เลือกรุ่น ---</option>
                                    <?php
			  
		$rstTemp=mysql_query('select * from modelcar Order By idmodelcar ASC');
		while($arr_2=mysql_fetch_array($rstTemp)){
		?>
                                    <option value="<?=$arr_2['idmodelcar']?>">
                                      <?=$arr_2['namemodelcar']?>
                                    </option>
                                    <?php }?>
                                  </select></td>
                                </tr>
                                <tr bgcolor="#B5FFF4">
                                  <td>3</td>
                                  <td>แบบ</td>
                                  <td><select name='car2' id='car2'onChange="data_show(this.value,'car3','');" class="textbox">
                                    <option value="">--- เลือกแบบ ---</option>
                                    <option value=""> </option>
                                  </select></td>
                                  <td><select name='car23' id='car23'onChange="data_show(this.value,'car24','');" class="textbox">
                                    <option value="">--- เลือกแบบ ---</option>
                                    <option value=""> </option>
                                  </select></td>
                                </tr>
                                <tr bgcolor="#CCF5AB">
                                  <td>7</td>
                                  <td>Model/sfx</td>
                                  <td><select name='car3' id='car3'onChange="data_show(this.value,'car4','');"class="textbox">
                                    <option value="">--- เลือก sf ---</option>
                                  </select></td>
                                  <td><select name='car24' id='car24'onChange="data_show(this.value,'car25','');"class="textbox">
                                    <option value="">--- เลือก sf ---</option>
                                  </select></td>
                                </tr>
                                <tr bgcolor="#B5FFF4">
                                  <td>5</td>
                                  <td>สี</td>
                                  <td><select name='car4' id='car4'class="textbox"onChange="data_show(this.value,'car5','');">
                                    <option value="">--- เลือกสี ---</option>
                                  </select></td>
                                  <td><select name='car25' id='car25'class="textbox"onChange="data_show(this.value,'car26','');">
                                    <option value="">--- เลือกสี ---</option>
                                  </select></td>
                                </tr>
                                <tr bgcolor="#CCF5AB">
                                  <td>6</td>
                                  <td>Vin</td>
                                  <td><select name='car5' id='car5'class="textbox"onChange="data_show(this.value,'car6','');">
                                    <option value="">--- เลือกVIN---</option>
                                  </select></td>
                                  <td><input type="text" name="vinnum" id="vinnum" class="textbox"></td>
                                </tr>
                                <tr bgcolor="#B5FFF4">
                                  <td>7</td>
                                  <td>เลขเครื่อง</td>
                                  <td><input type="text" name="vinnum2" id="vinnum2" class="textbox"></td>
                                  <td><input type="text" name="vinnum3" id="vinnum3" class="textbox"></td>



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// Start XmlHttp Object
function uzXmlHttp(){
    var xmlhttp = false;
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    }catch(e){
        try{
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            xmlhttp = false;
        }
    }
 
    if(!xmlhttp && document.createElement){
        xmlhttp = new XMLHttpRequest();
    }
    return xmlhttp;
}
// End XmlHttp Object

function data_show(select_id,result,point_id){
	var url = 'data.php?select_id='+select_id+'&result='+result+'&point_id='+point_id;
	//alert(url);
	
    xmlhttp = uzXmlHttp();
    xmlhttp.open("GET", url, false);
	xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded;charset=utf-8"); // set Header
    xmlhttp.send(null);
	document.getElementById(result).innerHTML =  xmlhttp.responseText;
	
}


if('<?=$action?>'=='Edit'){
	window.onLoad=data_show('<?=$province?>','amphur','<?=$amphur?>'); 
	window.onLoad=data_show('<?=$amphur?>','district','<?=$district?>'); 
}

<?php  //เลือกรุ่นรถยนต์หน้า แลกรถ ขาย*******************************************************************************?>


<?php  //เลือกรุ่นรถยนต์  ?>
<? if($result=='car1'){ ?>
<option value="">เลือกรุ่น</option>
<?php
	$rstTemp=mysql_query('select * from modelcar Order By idmodelcar ASC');
		while($arr_2=mysql_fetch_array($rstTemp)){
		?>
                                    <option value="<?=$arr_2['idmodelcar']?>">
                                      <?=$arr_2['namemodelcar']?></option>
<? }}?>

<? if($result=='car2'){ ?>
<option value="">เลือกรุ่น</option>
<?php
	$idcar1=$select_id;
	$rstTemp=mysql_query("select * from model2 Where idmodelcar ='".$select_id."'  Order By idmodelcar ASC");
	while($arr_2=mysql_fetch_array($rstTemp)){
?>
	<option value="<?=$arr_2['idmodel2']?>"><?=$arr_2['idmodel2']?></option>
<? }}?>

<? if($result=='car3'){ ?>
<select name='car3' id='car3'>
<option value="">เลือกแบบ</option>
	<?
	
	$rstTemp=mysql_query("select * from  generationcar Where mo2 ='".$select_id."' Order By idgenerationcar ASC");
	while($arr_2=mysql_fetch_array($rstTemp)){
	?>
	<option value="<?=$arr_2['idgenerationcar']?>"><?=$arr_2['namegenerationcar'],"-",$arr_2['sfid']?></option>
	<? }?>
</select>
<? }?>
<? if($result=='car4'){ ?>
<select name='car4' id='car4'>
<option value="">เลือกสี</option>
<script language="javascript">
var garde ='F';
$sf1=$select_id; //ให้เป็น idgenara
</script>
	<?	
	
	$rstTemp=mysql_query("select * from colorcar Where idgenerationcar ='".$select_id."'  Order By idgenerationcar ASC");
	while($arr_2=mysql_fetch_array($rstTemp)){
	?>
	<option value="<?=$arr_2['colorid']?>"><?=$arr_2['idcolorcar'];?></option>
	<? }?>
</select>
<? }?>
<? if($result=='car5'){ ?>
<select name='car5' id='car5'>
<option value="">เลือกสี</option>
	
	<option value=""><?= ต้องการให้แสดงข้อมุลตามเงื่อนไข?></option>
	
</select>
<? }?>


<?php  //เลือกรุ่นรถยนต์หน้า แลกรถ แลก*******************************************************************************?>