ใช้ jquery ajaxForm แล้วไม่มารถดึง value ใน textarea ที่เป็น CKeditor ได้ครับ

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript" src="js/jquery.form.js"></script>
<script type="text/javascript">
	$(document).ready(function() {
		$('#loading')
		.ajaxStart(function(){
			$(this).show();
		})
		.ajaxComplete(function(){
			$(this).hide();
		});
		
		var option = {
			beforeSubmit: showRequest,
			success: showResponse,
			url: 'room_update.php',
			clearForm: true
		};
		$('#add_hotel').submit(function(){
			$(this).ajaxSubmit(option);
			return false;
		});
	}); //end dom Jqry

	
	function showRequest(formData, jqForm, options){
		var hotel_img = document.getElementById('hotel_img').value;
		  if (hotel_img == "") {
		   	alert('Please Insert Hotel Img');
		    return false;
		  }
		  return true;
	}

	function showResponse(data){
		if (data == 1) {
			$('#result').html('<div class="success">Create Success</div>').show();
		} else {
			//$('#result').html('<div class="error">Create Error</div>').show();
			$('#result').html(data).show();
		}
	} 
		
</script>

<textarea name="hotel_information" id="hotel_information"> </textarea>
				<script type="text/javascript">
					//<![CDATA[
						CKEDITOR.replace( 'hotel_information',{
							  language   : 'en',
							  skin   : 'office2003',
							  height   : 200,
							  width: 890,
								toolbar : 'Full',
									filebrowserBrowseUrl : 'ckfinder/ckfinder.html',
									filebrowserImageBrowseUrl : 'ckfinder/ckfinder.html?Type=Images',
									filebrowserFlashBrowseUrl : 'ckfinder/ckfinder.html?Type=Flash',
									filebrowserUploadUrl : 'ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Files',
									filebrowserImageUploadUrl : 'ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Images',
									filebrowserFlashUploadUrl : 'ckfinder/core/connector/php/connector.php?command=QuickUpload&type=Flash'
						} );
					//]]>
				</script>