function getElementsByClass(searchClass, tag, node) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\\s)"+searchClass+"(\\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
	return classElements;
}

function getParameterFromUrlString( name , urlString )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( urlString );
  if( results == null )
    return "";
  else
    return results[1];
}


function showEditLinks(type, show) {
	var EditLinksLayout = getElementsByClass('ActionBar'+type, 'div');

	var EditLinksDisplayStyle = 'block';
	var LinkToHide = document.getElementById('EditLink'+type+'Show');
	var LinkToShow = document.getElementById('EditLink'+type+'Hide');
	if(!show) {
		EditLinksDisplayStyle = 'none';
		var temp = LinkToHide;
		LinkToHide = LinkToShow;
		LinkToShow = temp;
	}

	LinkToHide.style.display = "none";
	LinkToShow.style.display = "inline";

	for(var i=0, il=EditLinksLayout.length; i<il; i++){
		EditLinksLayout[i].style.display = EditLinksDisplayStyle;
	}

	return true;
}

function hideAdministrationBar(){
	document.getElementById('AdministrationBarButton').style.display = 'block';
	document.getElementById('ActionBarPresentationAdministrator').style.display = 'none';
}


function showAdministrationBar(){
	document.getElementById('AdministrationBarButton').style.display = 'none';
	document.getElementById('ActionBarPresentationAdministrator').style.display = '';
}

// Wrtten by Jason Karl Davis
// http://www.webdeveloper.com/forum/archive/index.php/t-102595.html

if(typeof HTMLElement!='undefined'&&!HTMLElement.prototype.click)
HTMLElement.prototype.click=function(){
var evt = this.ownerDocument.createEvent('MouseEvents');
evt.initMouseEvent('click', true, true, this.ownerDocument.defaultView, 1, 0, 0, 0, 0, false, false, false, false, 0, null);
this.dispatchEvent(evt);
}

// show hide elements
function setElementByIdDisplay(ElementId, Display) {
	Element = document.getElementById(ElementId);
	if (Element) {
		Element.style.display = Display;
	}
}

function showContextMenu(DivElement, AdminBarId) {
	//Temporarily disabled
	//DivElement.style.border = 'thin dashed black';
	//document.getElementById(AdminBarId).style.display = 'block';
	return true;
}

function hideContextMenu(DivElement, AdminBarId) {
	//Temporarily disabled
	//DivElement.style.border = '';
	//document.getElementById(AdminBarId).style.display = 'none';
	return true;
}

function removeContentItemImage(ContentItem_Id) {
	var url = 'ajax.php?ScriptName=Ajax_RemoveContentItemImage&ContentItem_IdForImage='+ContentItem_Id;
	if (!send_xmlhttprequest(hideContentItemImage, 'GET', url)) {
		return false;
	}
}

function hideContentItemImage(xmlhttp) {
	ImageDiv = document.getElementById('ContentItemImage');
	ImageDiv.style.display = 'none';
	return true;
}