gistfile1.phtml

<!--1st select box-->
<td class="h_c">
<select name="strtpnt" id="strtpnt"  class="inp_bx" onChange="ajaxcall(this.value)">  
	<option>-Select-</option>
		<?php 			  
			$sql = "select distinct(start) from tbl_place";
			$retval = mysql_query($sql, $conn );
		  while($row = mysql_fetch_assoc($retval,MYSQL_ASSOC)){ $strtpnt= $row['start'];?>	
				<option value="<?php echo $strtpnt;?>"><?php echo $strtpnt;?></option>
		<?php } ?>
</select>

<!--2nd select box--><td class="hc">
<select name="destination" id="destination" class="inp_bx"> 
	  <option>-Select-</option>
</select></td>

<!--3rd select box-->
<select name="duration" id="duration"  class="inp_bx" onchange="textHint();"> 
	<option value="1">-Select-</option>
		<?php
			$sql = "select distinct(package_type) from tbl_package";
			$retval = mysql_query($sql, $conn );
				while($row = mysql_fetch_assoc($retval,MYSQL_ASSOC)){ $package= $row['package_type'];?>	
				<option value="<?php echo $package?>"><?php echo $package;?></option>
		<?php } ?>
</select>

///Now the ajax calls
<script type="text/javascript">
	function textHint() {
		//alert("valar morghulis .arya");
		var start=$("#strtpnt").val();
		var destin=$("#destination").val();
		var ans=confirm("Do you want to continue touring");
		if(ans) {
			alert("Enjoy the tour visiting various places");
			$.post('tour.php', { start:start,destin:destin}, function(response) {
    			console.log(response);
    			$('.h_c').html(response);
			});
		} else {
			window.Location="http://localhost/tpc_new/home1.php";
		}
		return false;
	}
	function ajaxcall(type) {
		var parameters = 'data='+type;
		var argUrl = 'ajax_data.php';//alert(parameters);	
		$.ajax({
			url: argUrl,
			type: 'POST',
			data: parameters,
			success: function (str) {
				 $(".hc").html(str);	
				alert(parameters);				
				}
			});
	}
	</script>