// Variablendeklaration
var dynamic_default = 100;
var dynamic_increment = 10;


var dynamic_bigger = ['', '+', 'Schrift vergrößern', 'metanavi', '', '', '', '', '', '', ' ']
var dynamic_smaller = ['', '-', 'Schrift verkleinern', 'metanavi', '', '', '', '', '', '', '']

//==================================================================================================================
// Dynamic Fontsize Klasse
//==================================================================================================================
function dynamicFontSize( increment, bigger, smaller, def) {

	this.w3c = (document.getElementById);
	this.ms = (document.all);
	this.userAgent = navigator.userAgent.toLowerCase();
	this.isMacIE = ((this.userAgent.indexOf('msie') != -1) && (this.userAgent.indexOf('mac') != -1) && (this.userAgent.indexOf('opera') == -1));
	this.isOldOp = ((this.userAgent.indexOf('opera') != -1)&&(parseFloat(this.userAgent.substr(this.userAgent.indexOf('opera')+5)) <= 7));

	if ((this.w3c || this.ms) && !this.isOldOp && !this.isMacIE) {
	
		this.name = 'dynamicFontSize';
		this.cookieName = 'dynamicSize';
		this.increment = increment;
		this.def = def;
		this.defPx = Math.round(16 * (def / 100))
		this.base = 1;
		this.pref = this.getPref();
		this.testHTML = '<div id="dynamicFontTestDiv" style="position:absolute;visibility:hidden;line-height:1em;">&nbsp;</div>';
		this.biggerLink = this.getLinkHtml( 1, bigger);
		this.smallerLink = this.getLinkHtml( -1, smaller);
		
	} else {

		this.dynaFontInit = new Function('return true;');
	}

	this.allLinks = this.biggerLink + this.smallerLink;
}

//==================================================================================================================
dynamicFontSize.prototype.dynaFontInit = function() {

	document.writeln(this.testHTML);
	this.body = (this.w3c) ? document.getElementsByTagName('body')[0].style : document.all.tags('body')[0].style;
	this.dynamicFontTestDiv = (this.w3c) ? document.getElementById( 'dynamicFontTestDiv') : document.all['dynamicFontTestDiv'];
	var h = ( this.dynamicFontTestDiv.clientHeight) ? parseInt( this.dynamicFontTestDiv.clientHeight): ( this.dynamicFontTestDiv.offsetHeight) ? parseInt( this.dynamicFontTestDiv.offsetHeight) : 999;
	if(h < this.defPx) this.base = this.defPx/h;
	this.body.fontSize = Math.round( this.pref * this.base) + '%';
}

//==================================================================================================================
dynamicFontSize.prototype.getLinkHtml = function( direction, properties) {

	var html = 
			properties[0] + '<a href="#" onclick="dynamicFontSizeInstance.setSize(' + direction + '); return false;"';
	html += (properties[2])? ' title="' + properties[2] + '"':'';
	html += (properties[3]) ? ' class="' + properties[3] + '"':'';
	html += (properties[4]) ? ' id="' + properties[4] + '"':'';
	html += (properties[5]) ? ' name="' + properties[5] + '"':'';
	html += (properties[6])?'accesskey="' + properties[6] + '"':'';
	html += (properties[7])?'onmouseover="' + properties[7] + '"':'';
	html += (properties[8])?'onmouseout="' + properties[8] + '"':'';
	html += (properties[9])?'onfocus="' + properties[9] + '"':'';
	return html += '>'+ properties[1] + '<' + '/a>' + properties[10];
}

//==================================================================================================================
dynamicFontSize.prototype.getPref = function() {
	
	var pref = this.getCookie( this.cookieName);
	
	if( pref) {
	
		return parseInt( pref);
	
	} else {
	
		return this.def;
	}
}

//==================================================================================================================
dynamicFontSize.prototype.setSize = function( direction) {
	
	this.pref = (direction) ? this.pref+(direction * this.increment) : this.def;
	this.setCookie( this.cookieName, this.pref);
	this.body.fontSize = Math.round( this.pref * this.base) + '%';
}

//==================================================================================================================
dynamicFontSize.prototype.getCookie = function( cookieName) {

	var cookie = cookieManager.getCookie( cookieName);
	return (cookie) ? cookie : false;
}

//==================================================================================================================
dynamicFontSize.prototype.setCookie = function( cookieName,cookieValue) {

	return cookieManager.setCookie( cookieName, cookieValue);
}

//==================================================================================================================

var  dynamicFontSizeInstance = new dynamicFontSize( dynamic_increment, dynamic_bigger, dynamic_smaller, dynamic_default);

//==================================================================================================================