ใช้ $.getJSON( กับ mssql แต่ไม่ส่งค่ากลับมาที่หน้าเดิมค่ะ

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<script src="Scripts/swfobject_modified.js" type="text/javascript"></script>
<script type="text/javascript">
$(function(){

	$("#id_page").change(function(){
			//var url = "generation.php?id_page="+$(this).val() ;
		var url = window.location="generation.php?id_page="+$(this).val();
		
		$.getJSON(
				url=window.location="generation.php?id_page="+$(this).val() , 
				function(resp){
					var opt = "<option value='0'>-- Select page --</option>";
					
					for(var i=0;i<resp.length;i++){
						opt += "<option value='"+ resp[i].id_maintopic+"'>"+resp[i].main_topic+"</option>";
					}
					$("#id_maintopic").html( opt );
				
				} 
		);
		
	});

})

</script>