var efa_default=75;
var efa_increment=8;
// maximal + minimal zoom entry values added by grishan Sept. 2005
var max_zoom=115;
var min_zoom=59;

var efa_bigger=['<div class="textzoom"><p style="padding: 0; margin: 0; line-height: 15px;">','<img class="margsmall" src="images/textzoomin_button.gif" />','Schrift gr&ouml;sser stellen','','','','','','','','']

var efa_reset=['','<img class="margsmall" src="images/textzoomreset_button.gif" />','Schrift zur&uuml;cksetzen','','','','','','','','']

var efa_smaller=['','<img class="margsmall" src="images/textzoomout_button.gif" />','Schrift kleiner stellen','','','','','','','','<' + '/p><' + '/div>']

function Efa_Fontsize(increment,bigger,reset,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.isOldOpfake=((this.userAgent.indexOf('opera') != -1)&&(parseFloat(this.userAgent.substr(this.userAgent.indexOf('opera')+5)) <= 7));
//for proper Opera dedection if Operas User Agent Switching is aktive - added by grishan Jan. 2006
this.isOldOpreal=((this.userAgent.indexOf('opera') != -1)&&(parseFloat(this.userAgent.substr(this.userAgent.indexOf('opera')+6)) <= 7));

if ((this.w3c || this.ms) && !this.isOldOpfake && !this.isMacIE && !this.isOldOpreal) {
this.name="efa_fontSize";
this.cookieName='efaSize';
this.increment=increment;
this.def=def;
this.defPx=Math.round(16*(def/100))
this.base=1;
this.pref=this.getPref();
this.testHTML='<div id="efaTest" style="position:absolute;visibility:hidden;line-height:1em;">&nbsp;</div>';
this.biggerLink=this.getLinkHtml(1,bigger);
this.resetLink=this.getLinkHtml(0,reset);
this.smallerLink=this.getLinkHtml(-1,smaller);
} else {
this.biggerLink='';
this.resetLink='';
this.smallerLink='';
this.efaInit=new Function('return true;');
}

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

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

Efa_Fontsize.prototype.getLinkHtml=function(direction,properties) {
var html=properties[0] + '<a href="#" style="background: transparent;" onclick="efa_fontSize.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];
}

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

Efa_Fontsize.prototype.setSize=function(direction) {
this.pref=(direction)?this.pref+(direction*this.increment):this.def;
//maximum Zoom (in Percent) added by grishan Sept. 2005
if ( this.pref >= max_zoom ) {
this.pref=max_zoom;
this.setCookie(this.cookieName,this.pref);
this.body.fontSize=Math.round(this.pref*this.base) + '%';
}
//minimum Zoom (in Percent) added by grishan Sept. 2005
if ( this.pref <= min_zoom ) {
this.pref=min_zoom;
this.setCookie(this.cookieName,this.pref);
this.body.fontSize=Math.round(this.pref*this.base) + '%';
}

else {
this.setCookie(this.cookieName,this.pref);
this.body.fontSize=Math.round(this.pref*this.base) + '%';
}
}

Efa_Fontsize.prototype.getCookie=function(cookieName) {
var cookie=cookieManager.getCookie(cookieName);
return (cookie)?cookie:false;
}

Efa_Fontsize.prototype.setCookie=function(cookieName,cookieValue) {
return cookieManager.setCookie(cookieName,cookieValue);
}

var efa_fontSize=new Efa_Fontsize(efa_increment,efa_bigger,efa_reset,efa_smaller,efa_default);