function ajaxSetup()
{
  var xmlHttp;
  try{ xmlHttp = new XMLHttpRequest(); }
  catch (e)
  {
    try{ xmlHttp=new ActiveXObject("Msxml2.XMLHTTP"); }
    catch (e)
    {
      try{ xmlHttp=new ActiveXObject("Microsoft.XMLHTTP"); } 
      catch (e){ return -1; }
    }
  }
return xmlHttp;
} 

var ajaxCache = new Array();

function changeState(fID, outputLocationID)
{
  if( ajaxCache[fID] != undefined )
  {
    document.getElementById(outputLocationID).innerHTML = ajaxCache[fID];
  }
  else
  {
    var ajaxRequest = ajaxSetup();

    ajaxRequest.onreadystatechange = function () {
      if(ajaxRequest.readyState == 4)
      {
        document.getElementById(outputLocationID).innerHTML = ajaxRequest.responseText;
        ajaxCache[fID] = ajaxRequest.responseText;
      }
    }

    var queryString = "?s=" + fID;
    ajaxRequest.open("GET", "/newSite/ajax.php" + queryString, true);
    ajaxRequest.send(null);
  }
  
  if( history.pushState != undefined )
  {
    var stateObj = { foo: "?s="+fID };
    history.pushState( stateObj, "title", "?s="+fID );
  }
  disableAJAXAnchorHREF();
  return null;
}


var getElementsByClassName = function (className, tag, elm){
	if (document.getElementsByClassName) {
		getElementsByClassName = function (className, tag, elm) {
			elm = elm || document;
			var elements = elm.getElementsByClassName(className),
				nodeName = (tag)? new RegExp("\\b" + tag + "\\b", "i") : null,
				returnElements = [],
				current;
			for(var i=0, il=elements.length; i<il; i+=1){
				current = elements[i];
				if(!nodeName || nodeName.test(current.nodeName)) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	else if (document.evaluate) {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = "",
				xhtmlNamespace = "http://www.w3.org/1999/xhtml",
				namespaceResolver = (document.documentElement.namespaceURI === xhtmlNamespace)? xhtmlNamespace : null,
				returnElements = [],
				elements,
				node;
			for(var j=0, jl=classes.length; j<jl; j+=1){
				classesToCheck += "[contains(concat(' ', @class, ' '), ' " + classes[j] + " ')]";
			}
			try	{
				elements = document.evaluate(".//" + tag + classesToCheck, elm, namespaceResolver, 0, null);
			}
			catch (e) {
				elements = document.evaluate(".//" + tag + classesToCheck, elm, null, 0, null);
			}
			while ((node = elements.iterateNext())) {
				returnElements.push(node);
			}
			return returnElements;
		};
	}
	else {
		getElementsByClassName = function (className, tag, elm) {
			tag = tag || "*";
			elm = elm || document;
			var classes = className.split(" "),
				classesToCheck = [],
				elements = (tag === "*" && elm.all)? elm.all : elm.getElementsByTagName(tag),
				current,
				returnElements = [],
				match;
			for(var k=0, kl=classes.length; k<kl; k+=1){
				classesToCheck.push(new RegExp("(^|\\s)" + classes[k] + "(\\s|$)"));
			}
			for(var l=0, ll=elements.length; l<ll; l+=1){
				current = elements[l];
				match = false;
				for(var m=0, ml=classesToCheck.length; m<ml; m+=1) {
					match = classesToCheck[m].test(current.className);
					if (!match) {
						break;
					}
				}
				if (match) {
					returnElements.push(current);
				}
			}
			return returnElements;
		};
	}
	return getElementsByClassName(className, tag, elm);
};

function disableAJAXAnchorHREF()
{
	var elementsToDisable = getElementsByClassName('dynamic', 'a'); 
	for(i = 0; i < elementsToDisable.length; i++)
	{
		elementsToDisable[i].href = 'javascript:void(0)';
	}
}

function navigateToNamedAnchor()
{
	var destination = window.location.hash.substr(1);
	if( destination != '' )
	{
		changeState(destination, 'contentPane');
	}
}