ดึงข้อมูลจาก textbox เก็บเข้าตัวแปร ไม่ทราบว่าทำไงหรอครับ

<?php
   require('conn_mysql.php');
   $sql="select * from master_tour_table"; 
   $query = mysql_query($sql);
   while($resule = mysql_fetch_array($query)) 
    {
     $title = $resule['title'];
     $tourID = $resule['tourID'];
	 ?>
	<input type="radio" name="tourID" id="tourID" value="<?php echo $tourID; ?>" onClick="this.form.to_tour.value = this.value"><?php echo $title; ?><br>
	<?php }?>
   <div id="showQuery" style="background-color:lightgray;width:400px;height:200px;overflow:auto"></div>
   <script>
  $("#tourID").click(function(){
       var selectedTourID = $("#tourID :checked").val();
       $.post("getTourInfo.php" , {to_tour:selectedTourID} , function(data){
             $("#showQuery").empty().append(data);
       });
  });
</script>

<?php
echo "select * from tourInfo where tour_id='{$_POST["to_tour"]}' ";
?>

<script language="JavaScript">
	function resutName(tourID)
	{
		switch(tourID)
		{
			<?php
			require('conn_mysql.php');
			$strSQL = "SELECT * FROM master_tour_table";
			$objQuery = mysql_query($strSQL);
			while($objResult = mysql_fetch_array($objQuery))
			{
			?>
				case "<?php echo $objResult["tourID"]; ?>":
				frmMain.txtName.value = "<?php echo $objResult["destination"]; ?>";
				break;
			<?php
			}
			?>
			default:
			 frmMain.txtName.value = "";
		}
	}
</script>
<form action="page.php" method="post" name="frmMain">
<?php
   
   $sql="select * from master_tour_table"; 
   $query = mysql_query($sql);
   while($resule = mysql_fetch_array($query)) 
    {
     $title = $resule['title'];
     $tourID = $resule['tourID'];
	 ?>
	<input type="radio" name="tourID" id="tourID" value="<?php echo $tourID; ?>" OnChange="resutName(this.value);"><?php echo $title; ?><br>
    <?php }?>
	<input name="txtName" type="text" value="">
    </form>
   

<?php
   require('conn_mysql.php');
   $sql="select * from master_tour_table"; 
   $query = mysql_query($sql);
   while($resule = mysql_fetch_array($query)) 
    {
     $title = $resule['title'];
     $tourID = $resule['tourID'];
	 ?>
	<input type="radio" name="tourID" id="tourID" value="<?php echo $tourID; ?>" /><?php echo $title; ?><br>
<?php }?>
   <div id="showQuery" style="background-color:lightgray;width:200px;height:1.8em;color:yellow;font-size:1.2em;"></div>
   <script>
  $("#tourID").click(function(){
       var selectedTourID = $("#tourID :checked").val();
       $.post("getTourInfo.php" , {to_tour:selectedTourID} , function(data){
             $("#showQuery").empty().append(data);
       });
  });
</script>

<?php
			require('conn_mysql.php');
			$strSQL = "SELECT * FROM master_tour_table where tourID='{$_POST["to_tour"]}' ";
			$objQuery = mysql_query($strSQL);
			$objResult = mysql_fetch_array($objQuery);
			echo $objResult["destination"]; 
?>