var http_request = false;
   function makePOSTRequest(url, parameters, alert) {
      http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
          // set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }

			if ( alert ) {
      	http_request.onreadystatechange = alertContents;
			} else {
      	http_request.onreadystatechange = updateContents;
			}
      http_request.open('POST', url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(parameters);
   }

	function updateContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            result = http_request.responseText;
						fields = result.split('^')
						
            document.getElementById('article_title').value = fields[0];
            document.getElementById('description').value = fields[1];
            document.getElementById('source').value = fields[2];
            document.getElementById('lookup-message').innerHTML = '';
         } 
      }
	}

   function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            result = http_request.responseText;
            document.getElementById('message-area').innerHTML = result;
         } else {
            alert('There was a problem with the request.');
         }
      }
   }

   function get_help(obj) {
      var poststr = "email=" + encodeURI( document.getElementById("email").value ) +
      							"&message=" + encodeURI( document.getElementById("message").value ) ;

      makePOSTRequest('/forms/help.rhtml', poststr, true);
   }

   function get_feedback(obj) {
      var poststr = "email=" + encodeURI( document.getElementById("email").value ) +
      							"&problem=" + encodeURI( document.getElementById("problem").value ) +
      							"&message=" + encodeURI( document.getElementById("message").value ) ;

      makePOSTRequest('/forms/feedback.rhtml', poststr, true);
   }

	function get_content_submit(obj) {
      var poststr = "email=" + encodeURI( document.getElementById("submit_email").value ) +
                    "&url=" + encodeURI( document.getElementById("url").value ) +
                    "&website=" + encodeURI( document.getElementById("website").value ) ;


      makePOSTRequest('/forms/submit.rhtml', poststr, true);
   }

   function get_postit(obj) {
     var poststr = "link=" + encodeURI( escape(document.getElementById("link").value) ) +
                    "&title=" + encodeURI( document.getElementById("article_title").value ) +
                    "&description=" + encodeURI( escape(document.getElementById("description").value) ) +
                    "&category=" + encodeURI( escape(document.getElementById("category").value) ) +
                    "&photo_link=" + encodeURI( escape(document.getElementById("photo_link").value) ) +
                    "&source=" + encodeURI( document.getElementById("source").value ) +
                    "&name=" + encodeURI( document.getElementById("name").value ) ;

      makePOSTRequest('/forms/postit.rhtml', poststr, true);
   }

	function lookup_link() {
    document.getElementById('lookup-message').innerHTML = '<font size=1 color=#364b8a>Getting metadata ... please wait </font>' 
		link = encodeURI( escape(document.getElementById("link").value) );
    makePOSTRequest('/forms/lookup_link.rhtml', "link=" + link, false ) 
	}
	

        function showLayer(layerName, shadowLayerName, zone)
        {
						zone.bgColor = '#eeeeee'

            if (document.getElementById) // Netscape 6 and IE 5+
            {
                var targetElement = document.getElementById(layerName);
								//alert ("layer " + layerName)
								//alert ("target" + targetElement)
                //var shadowElement = document.getElementById(shadowLayerName);
                //targetElement.style.top = shadowElement.style.top;
                targetElement.style.visibility = 'visible';
            }
        }


        function hideLayer(layerName)
        {
            if (document.getElementById) 
            {
                var targetElement = document.getElementById(layerName);
                targetElement.style.visibility = 'hidden';
            }
        }

   function get_email(obj) {
      var poststr = "email=" + encodeURI( document.getElementById("email").value ) +  "&message=" + encodeURI( document.getElementById("message").value ) + "&source=" + encodeURI( document.getElementById("source").value ) + "&title=" + encodeURI( document.getElementById("title").value ) + "&link=" + encodeURI( document.getElementById("link").value ) + "&description=" + encodeURI( document.getElementById("description").value ) ;

      makePOSTRequest('/forms/email.rhtml', poststr, true);
   }