var XMLHttpRequestObject = false; 

      if (window.XMLHttpRequest) {
        XMLHttpRequestObject = new XMLHttpRequest();
      } else if (window.ActiveXObject) {
        XMLHttpRequestObject = new ActiveXObject("Microsoft.XMLHTTP");
      }

      function gallery(dataID) 
      { 
	  var url = "galleryData.php";	  
        if(XMLHttpRequestObject) {
          var descTag = document.getElementById('main_content_textTwo'); 
          XMLHttpRequestObject.open("POST", url); 
		  XMLHttpRequestObject.setRequestHeader('Content-Type','application/x-www-form-urlencoded');

          XMLHttpRequestObject.onreadystatechange = function() 
          { 
            if (XMLHttpRequestObject.readyState == 4 && 
              XMLHttpRequestObject.status == 200) {
			  	var xmlDocument =  XMLHttpRequestObject.responseXML;
				displayData(xmlDocument)
            } 
          } 

          XMLHttpRequestObject.send("id=" + dataID); 
        }
      }
	  
	  function displayData(xmlDocument) {
	  var xmlDataNode;
	  var descriptionNode, imageNode;
	  var descriptionText, imageText;
	  
	  xmlDataNode = xmlDocument.documentElement;
	  descriptionNode = xmlDataNode.firstChild;
	  imageNode = descriptionNode.nextSibling;
	  
	  descriptionText = descriptionNode.firstChild.nodeValue;
	  imageText = imageNode.firstChild.nodeValue;
	 
		document.getElementById("main_content_textTwo").innerHTML="<p>"+descriptionText+"</p>";
		document.getElementById("large_gallery_image").innerHTML="<img src='images/gallery/"+imageText+"' alt='The Abbeydale Picture House' width='467' height='382' border='0'  />";
	  
	  }