// global.js replaces default.js

// BROWSERCHECK (used in slideshow)
var detect = navigator.userAgent.toLowerCase();
var lbSearch;
var OS,browser,version,total,thestring;
if (checkIt('konqueror'))
{
	browser = "Konqueror";
	OS = "Linux";
}
else if (checkIt('safari')) browser = "Safari"
else if (checkIt('omniweb')) browser = "OmniWeb"
else if (checkIt('opera')) browser = "Opera"
else if (checkIt('webtv')) browser = "WebTV";
else if (checkIt('icab')) browser = "iCab"
else if (checkIt('msie')) browser = "Internet Explorer"
else if (!checkIt('compatible'))
{
	browser = "Netscape Navigator"
	version = detect.charAt(8);
	
	if(checkIt('netscape')) 
	{
		x=false;
		y=0;
		thisversion = "";
		while(!x)
		{
			version = detect.charAt(place+y + thestring.length);
			if(version==";" || version==" " || version=="") x = true;
			else
			{	thisversion = thisversion+version
				y=y+1;
			}
		}
		version= thisversion;
	}
	
	
}
else browser = "An unknown browser";

if (!version){
	x=false;
	y=0;
	thisversion = "";
	while(!x)
	{
		version = detect.charAt(place+y + thestring.length);
		if(version==";" || version==" " || version=="") x = true;
		else
		{	thisversion = thisversion+version
			y=y+1;
		}
	}
	version= thisversion;
}

if (!OS)
{
	if (checkIt('linux')) OS = "Linux";
	else if (checkIt('x11')) OS = "Unix";
	else if (checkIt('mac')) OS = "Mac"
	else if (checkIt('win')) OS = "Windows"
	else OS = "an unknown operating system";
}

function checkIt(string)
{
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}


//FONT SIZING TOOL
function setActiveSS(title) {
  var i, a, main;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title")) {
      a.disabled = true;
      if(a.getAttribute("title") == title) a.disabled = false;
    }
  }
}

function getActiveStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1 && a.getAttribute("title") && !a.disabled) return a.getAttribute("title");
  }
  return null;
}

function getPreferredStyleSheet() {
  var i, a;
  for(i=0; (a = document.getElementsByTagName("link")[i]); i++) {
    if(a.getAttribute("rel").indexOf("style") != -1
       && a.getAttribute("rel").indexOf("alt") == -1
       && a.getAttribute("title")
       ) 
    return a.getAttribute("title");
  }
  return null;
}

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

window.onload = function(e) {
  var cookie = readCookie("style");
  var title = cookie ? cookie : getPreferredStyleSheet();
  setActiveSS(title);
}

window.onunload = function(e) {
  var title = getActiveStyleSheet();
  createCookie("style", title, 365);
}

var cookie = readCookie("style");
var title = cookie ? cookie : getPreferredStyleSheet();
setActiveSS(title);


//COLUMN GRID SETUP
function setupGrid() {
	columnStretch();
	//alert('Oude versie is actief');
}
function columnStretch() {
	document.getElementById('wrapper').style.height = '1%';
	
	var y,w;
	if (self.innerHeight) {
		w = self.innerWidth;
		y = self.innerHeight;
	 }
	else if (document.documentElement && document.documentElement.clientHeight) {
		w = document.documentElement.clientWidth;
		y = document.documentElement.clientHeight;
	 }
	else if (document.body) {
		w = document.body.clientWidth;
		y = document.body.clientHeight;
	}
	/*if (w < 972) {
		document.getElementById('panels').style.display = 'none';
	}
	else {
		document.getElementById('panels').style.display = 'block';
	}*/

	var h = document.getElementById('header').offsetHeight;
	var c = document.getElementById('content').offsetHeight;
	var f = document.getElementById('footer').offsetHeight;
	var a = h + c + f;
	var b = document.getElementById('wrapper').offsetHeight;
	
	if ((a - b) > 0) {
		var coldif = a;
	}
	else {
		var coldif = b;
	}

	var dif = y - coldif;

	if (dif > 0) {
		var z = y; //body is hoger dan content
	}
	else {
		var z = coldif; //content is hoger dan body
	}
	
	document.getElementById('wrapper').style.height = z + "px";
	var fp = z - f;

	document.getElementById('footer').style.top = fp + "px";
	document.getElementById('navigation').style.height = z + "px";
	document.getElementById('nav').style.height = z + "px";
	
	if (document.getElementById('mainnavtabbed') != null) document.getElementById('mainnavtabbed').style.visibility = 'visible';
	if (document.getElementById('mainnavtabbed') != null)  {
		document.getElementById('nav').style.height = z + "px";
	}
}