// funkce dekoduje email
// 0902031711pf-1 PATCH "doplneny parametr class_name-kterym => trida odkazu." 
function printEmail(email, title, class_name){
  
  add_class = "";
  if (class_name != null)
  {
    add_class = ' class="' + class_name + '" ';
  }
  
  // 0905131308pf "Pokud prijde prazdny e-mail bere se automaticky ze zakodovaneho e-mailu"
  if (title == '')
  {
    title = base64decode(email);
  } // end if 
  
  // 0810301622pf-2 FIX "titulek a nazev se nekoduje, kvuli cestine" 
  document.write('<a href="mailto:' + base64decode(email) + '" title="' + title + '" ' + add_class + '>' + title + '</a>');

}


// http://www.webtoolkit.info/javascript-base64.html
function base64decode(input) {
 
	_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";

        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = _keyStr.indexOf(input.charAt(i++));
            enc2 = _keyStr.indexOf(input.charAt(i++));
            enc3 = _keyStr.indexOf(input.charAt(i++));
            enc4 = _keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = _utf8_decode(output);

        return output;

    }

// http://www.webtoolkit.info/javascript-base64.html
function _utf8_decode(utftext) {

        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while ( i < utftext.length ) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            }
            else if((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i+1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            }
            else {
                c2 = utftext.charCodeAt(i+1);
                c3 = utftext.charCodeAt(i+2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }