function Cookiemanager(name,defaultExpiration,expirationUnits,defaultDomain,defaultPath) {
this.name = name;
this.defaultExpiration = this.getExpiration(defaultExpiration,expirationUnits);
this.defaultDomain = (defaultDomain)?defaultDomain:(document.domain.search(/[a-zA-Z]/) == -1)?document.domain:document.domain.substring(document.domain.indexOf('.') + 1,document.domain.length);
this.defaultPath = (defaultPath)?defaultPath:'/';
this.cookies = new Object();
this.expiration = new Object();
this.domain = new Object();
this.path = new Object();
window.onunload = new Function (this.name+'.setDocumentCookies();');
this.getDocumentCookies();
}
Cookiemanager.prototype.getExpiration = function(expiration,units) {
expiration = (expiration)?expiration:7;
units = (units)?units:'days';
var date = new Date();
switch(units) {
case 'years':
date.setFullYear(date.getFullYear() + expiration);
break;
case 'months':
date.setMonth(date.getMonth() + expiration);
break;
case 'days':
date.setTime(date.getTime()+(expiration*24*60*60*1000));
break;
case 'hours':
date.setTime(date.getTime()+(expiration*60*60*1000));
break;
case 'minutes':
date.setTime(date.getTime()+(expiration*60*1000));
break;
case 'seconds':
date.setTime(date.getTime()+(expiration*1000));
break;
default:
date.setTime(date.getTime()+expiration);
break;
}
return date.toGMTString();
}
Cookiemanager.prototype.getDocumentCookies = function() {
var cookie,pair;
var cookies = document.cookie.split(';');
var len = cookies.length;
for(var i=0;i < len;i++) {
cookie = cookies[i];
while (cookie.charAt(0)==' ') cookie = cookie.substring(1,cookie.length);
pair = cookie.split('=');
this.cookies[pair[0]] = pair[1];
}
}
Cookiemanager.prototype.setDocumentCookies = function() {
var expires = '';
var cookies = '';
var domain = '';
var path = '';
// Cookiemanager correction by grishan Apr. 2006
// Prevents that the cookiemanager overrides other existing cookies
// with default expiration, path and domain values (Security)!
// Only the cookie for efa_fontSize will be set !
var zoomcookie = 'susenka';
var zoomcookiename = 'susenka';
expires = (this.expiration[name])?this.expiration[name]:this.defaultExpiration;
if ( this.cookies[zoomcookie] ) {
document.cookie = zoomcookiename + '=' + this.cookies[zoomcookie] + '; expires=' + expires + '; path=/';
}
return true;
}
Cookiemanager.prototype.getCookie = function(cookieName) {
var cookie = this.cookies[cookieName]
return (cookie)?cookie:false;
}
Cookiemanager.prototype.setCookie = function(cookieName,cookieValue,expiration,expirationUnits,domain,path) {
this.cookies[cookieName] = cookieValue;
if (expiration) this.expiration[cookieName] = this.getExpiration(expiration,expirationUnits);
if (domain) this.domain[cookieName] = domain;
if (path) this.path[cookieName] = path;
return true;
}
var cookieManager = new Cookiemanager('cookieManager',1,'days');


var efa_default = 84;
/* var efa_increment = 8;*/
var efa_increment = 1.05;
// maximal + minimal zoom entry values added by grishan Sept. 2005
var max_zoom = 165;
var min_zoom = 70;


var navAgent = navigator.userAgent.toLowerCase();
var isop = ((navAgent.indexOf('opera') != -1));
if (isop == true ) {
var efa_default = 84;
var efa_increment = 1.05;
var max_zoom = 165;
var min_zoom = 70;
}

var efa_bigger = ['<div id="textzoom">',
'<img height="24" width="24" alt="zvětšit písmo" title="zvětšit písmo" src="/ikony/plus.png" />',
'',
'',
'',
'',
'',
'',
'',
'',
''
]

var efa_reset = ['',
'<img height="24" width="24" alt="standardní velikost písma" title="standardní velikost písma" src="/ikony/null.png" />',
'',
'',
'',
'',
'',
'',
'',
'',
''
]

var efa_smaller = ['',
'<img height="24" width="24" alt="zmenšit písmo" title="zmenšit písmo" src="/ikony/minus.png" />',
'',
'',
'',
'',
'',
'',
'',
'',
'<' + '/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)) <= 9));
//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)) <= 9));


if ((this.w3c || this.ms) && !this.isOldOpfake && !this.isMacIE && !this.isOldOpreal) {
this.name = "efa_fontSize";
this.cookieName = 'susenka';
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(4,bigger);
this.resetLink = this.getLinkHtml(2,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="#" 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; */
//window.alert(direction);
if (direction == 2) this.pref = this.def;
if (direction == 4) this.pref = this.pref = this.pref * this.increment; 
if (direction == 1) this.pref = this.pref = this.pref / this.increment;

//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) + '%';
}
//window.alert(this.body.fontSize);
}

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);