addEvent( window, 'load', setLinkBehaviours );
addEvent( window, 'load', relNoFollow );

/* thanks to PPK www.quirksmode.org */
function addEvent( obj, type, fn ) 
{
	if (obj.addEventListener)
	{
		obj.addEventListener( type, fn, false );
	}
	else if ( obj.attachEvent ) 
	{
		obj["e"+type+fn] = fn;
		obj[type+fn] = function() 
		{ 
			obj["e"+type+fn]( window.event ); 
		}
		obj.attachEvent( "on"+type, obj[type+fn] );
	} 
}

function removeEvent( obj, type, fn ) 
{
	if ( obj.detachEvent ) 
	{
		obj.detachEvent( "on"+type, obj[type+fn] );
		obj[type+fn] = null;
	} 
	else if (obj.removeEventListener)
	{
		obj.removeEventListener( type, fn, false );
	}
}

var XMLHttpFactories = [ 
	function() { return new XMLHttpRequest() }
	, function() { return new ActiveXObject( 'Msxml2.XMLHTTP' ) }
	, function() { return new ActiveXObject( 'Msxml3.XMLHTTP' ) }
	, function() { return new ActiveXObject( 'Microsoft.XMLHTTP' ) }
];

function GetXmlHttpObject()
{
	var xmlHttp = false;
	
	for( var i = 0; i < XMLHttpFactories.length; i++ )
	{
		try
		{
			xmlHttp = XMLHttpFactories[i]();
		}
		catch(e)
		{
			continue;
		}
		break;
	}
	return xmlHttp;
}

function sendRequest( url, callback, postData, preloadAction, addObj ) 
{
	var req = GetXmlHttpObject();
	
	if (!req) return;
	
	var method = ( postData ) ? "POST" : "GET";
	
	req.open(method,url,true);
	req.setRequestHeader('User-Agent','XMLHTTP/1.0');
	
	if (postData)
	{
		req.setRequestHeader('Content-type','application/x-www-form-urlencoded');
	}
	
	req.onreadystatechange = function() 
	{
	
		if( preloadAction != null )
		{
			preloadAction( req.readyState );
		}
		
		if( req.readyState != 4 ) 
		{
			return;
		}
		else
		{
			callback( req, addObj );
		}
	}
	
	if (req.readyState == 4)
	{
		return;
	}
	
	req.send( postData );
}

function trim( text )
{
	return text.replace( /^\s*|\s*$/g, '' );
}


// Heel handig... bron: http://www.crisis.nl
function insertAfter( newNode, existingNode )
{
	if( existingNode.nextSibling )
	{
		existingNode.parentNode.insertBefore( newNode, existingNode.nextSibling );
	}
	else 
	{
		existingNode.parentNode.appendChild( newNode );
	}
}

function setLinkBehaviours() {
	var Links = document.getElementsByTagName( 'A' );
	
	for( var i = 0; i < Links.length; i++ ) {
		if (Links[i].className.indexOf('external') !== -1) {
			Links[i].onclick = function() {
				var PartnerLinkWindow = window.open( this.href, 'target', '' );
				return false;
			}
		}
	}
}

function doUrchin( Link, Prefix )
{
	Link = Link.replace( /^(http(s)?:\/\/)/i, '' );
	Link = Link.replace( /\./i, '_' );
	
	if( Prefix != null )
	{
		Link = '/' + Prefix + '/' + Link;
	}
	
	;	
}

function relNoFollow()
{
	var PartnerLinks = document.getElementsByTagName('span');
	
	if( PartnerLinks.length > 0 )
	{
		for( var i = 0; i < PartnerLinks.length; i++ )
		{
			if( PartnerLinks[i].title.indexOf( 'http://' ) != -1 
				|| PartnerLinks[i].title.indexOf( 'https://' ) != -1 )
			{
				PartnerLinks[i].className		= 'partner';
				PartnerLinks[i].onmouseout 	= partnerMouseOut;
				PartnerLinks[i].onmouseover 	= partnerMouseOver;
				PartnerLinks[i].onclick 		= partnerClick;
			}
		}
	}
}

function partnerMouseOver()
{
	this.className = 'partner-hover';
}

function partnerMouseOut()
{
	this.className = 'partner';
}

function partnerClick()
{
	var PartnerLinkWindow = window.open( this.title, 'target', '' );
	doUrchin( this.title, 'span' );
}

// does not do anything right now!
// This script will determine if you need tot popup a window or not
function blaat()
{
	for (var i = 0, link; link = document.links[i]; i++) 
	{
		if( link.className.indexOf("pdf") >= 0 
			|| link.className.indexOf("extern") >= 0 ) 
		{
			link.target = "_blank";
			
			if (lang == "nl") 
			{
				insertAfter(document.createTextNode(" (nieuw venster)"), link);
			}
			else 
			{
				insertAfter(document.createTextNode(" (new window)"), link);
			}
		}
	}
}