var styles = new Array();
styles[0] = 'style_1.css';
styles[1] = 'style_2.css';

relDir = 'stylesheets/org/';

function switchStyle(stylename) {

	obj = document.getElementsByTagName('LINK');
	

	
	if (obj.length>0) {
		for (i=0;i<obj.length;i++) {
			if (obj[i].rel=='stylesheet') {
				obj[i].href=stylename;
			}
		}
	}
	
}

function getPreferedStyleNr() {

	st =  readCookie('stylesheet');

	if (st==null) {
		st = 0;
	}
	
	st = parseFloat(st);
	return st;
}

function setPreferedStyleNr(nr) {

	switchStyle(relDir+styles[nr]);
	createCookie('stylesheet', nr);
	
	/*
		shop frame aanwezig 
		Idee: http://www.codingforums.com/archive/index.php?t-10011.html
	*/
	if(document.getElementById('shopframe'))
	{
		var url = window.frames['shopframe'].document.getElementById('page').value;
		window.frames['shopframe'].document.location.href = url;
	}
}

function initStylesheets() {

	switchStyle(relDir+styles[getPreferedStyleNr()]);
}

 
function createCookie(name,value) {
	// clear cookie


    document.cookie = name + "=; path=/; expires=Thu, 01-Jan-70 00:00:01 GMT";
	var expdate = new Date (); // pre-set to the current time and date
	expdate.setTime(expdate.getTime()+60000*60*24*365);
	document.cookie = name+"="+value+"; path=/; expires="+expdate.toGMTString();
}

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;
}



/*	extra code door johan om fontgrootte van shop-iframe aan te kunnen passen	*/

function updateFrameFont(px)	{
	if(frames['shopframe'])	{
		frames['shopframe'].document.body.style.fontSize = px +"px";
	}	else	{
		document.body.style.fontSize = px +"px";
	}
	
	createCookie('stylesheetshop', px)

}