// font resizer
function Set_Cookie( name, value, expires, path, domain, secure ) {
    // set time, it's in milliseconds
    var today = new Date();
    today.setTime( today.getTime() );
    /*
    if the expires variable is set, make the correct
    expires time, the current script below will set
    it for x number of days, to make it for hours,
    delete * 24, for minutes, delete * 60 * 24
    */
    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() : "" ) +
	( ( path ) ? ";path=" + path : "" ) +
	( ( domain ) ? ";domain=" + domain : "" ) +
	( ( secure ) ? ";secure" : "" );
}

function Get_Cookie( 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 Delete_Cookie( name, path, domain ) {
    if ( Get_Cookie( name ) ) document.cookie = name + "=" +
	( ( path ) ? ";path=" + path : "") +
	( ( domain ) ? ";domain=" + domain : "" ) +
	";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}

function font_resizer_init() {
    font_resizer_minSize = 60;
    font_resizer_maxSize = 120;
    font_resizer_unit = "%";
    font_resizer_size = parseInt(Get_Cookie("font_resizer_size"));
    if(!font_resizer_size) {
	font_resizer_size = 80;
    }
    document.body.style.fontSize = (font_resizer_size) + font_resizer_unit;
}

function font_resizer_set(font_value) {
    font_resizer_size += font_value;
    if(font_resizer_size > font_resizer_maxSize) {
	font_resizer_size = font_resizer_maxSize;
	alert("maximale grootte");
    }
    if(font_resizer_size < font_resizer_minSize) {
	font_resizer_size = font_resizer_minSize;
	alert("minimale grootte");
    }
    Set_Cookie("font_resizer_size", font_resizer_size, 30);
    document.body.style.fontSize = (font_resizer_size) + font_resizer_unit;
}

function font_resizer_reset() {
    document.body.style.fontSize = "";
    Delete_Cookie("font_resizer_size");
    font_resizer_init();
}