var nCookieValue;

function setFontSizeStep(nStep) {
	switch (nStep)
	{
		case -1:
			sFontRelative = '55%';
			break;
		case 1:
			sFontRelative = '85%';
			break;
		case 0:
			//fallthrough
		default:
			sFontRelative = '';
			break;
	}
	document.body.style.fontSize=sFontRelative;
}

//init fontsize knopjes
function setSize(){
	nCookieValue = getCookie('initFontSize');
	if (nCookieValue == null) nCookieValue = '0';
	nCookieValue = parseInt(nCookieValue,10);

	setFontSizeStep(nCookieValue);
	
	if($('#fontGroter')!= null) {
		$('#fontGroter').click( function() {
			setLarger();
		});
	}
	if($('#fontKleiner')!= null) {
		$('#fontKleiner').click( function() {
			setSmaller();
		});
	}
	if ($('#fontNormaal')!=null) {
		$('#fontNormaal').click( function() {
			resetFont();
		});
	}
}

function setLarger() { 
	if (nCookieValue != 1) {
		nCookieValue = 1;
		setFontSizeStep(nCookieValue)	;
		setCookie('initFontSize',nCookieValue,7);
	}
}

function setSmaller() {
	if (nCookieValue != -1) {
		nCookieValue = -1;
		setFontSizeStep(nCookieValue)	;
		setCookie('initFontSize',nCookieValue,7);
	}
}

function resetFont() {
	nCookieValue = 0;
	setFontSizeStep(nCookieValue)	;
	setCookie('initFontSize',nCookieValue,7);
}

/* get, set, and delete cookies */
function getCookie( name ) {
	var start = document.cookie.indexOf( name + "=" );
	var len = start + name.length + 1;
	if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
		return null;
	}
	if ( start == -1 ) return null;
	var end = document.cookie.indexOf( ";", len );
	if ( end == -1 ) end = document.cookie.length;
	return unescape( document.cookie.substring( len, end ) );
}
	
function setCookie( name, value, expires, path, domain, secure ) {
	var today = new Date();
	today.setTime( today.getTime() );
	if ( expires ) {
		expires = expires * 1000 * 60 * 60 * 24;
	}
	var expires_date = new Date( today.getTime() + (expires) );
	document.cookie = name+"="+escape( value ) +
		( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()
		( ( path ) ? ";path=" + path : "" ) +
		( ( domain ) ? ";domain=" + domain : "" ) +
		( ( secure ) ? ";secure" : "" );
}
	
function deleteCookie( name, path, domain ) {
	if ( getCookie( name ) ) document.cookie = name + "=" +
			( ( path ) ? ";path=" + path : "") +
			( ( domain ) ? ";domain=" + domain : "" ) +
			";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}