function changeElementProps(id) {
    if(document.getElementById(id).disabled == true) {
        document.getElementById(id).disabled = false;
        document.getElementById(id).className = 'submit';
    }
    else {
        document.getElementById(id).disabled = true;
        document.getElementById(id).className = 'submit_disabled';
    }
    
}


    <!--

    DayName_pl = new Array(7)
    DayName_pl[0] = "niedziela"
    DayName_pl[1] = "poniedziałek"
    DayName_pl[2] = "wtorek"
    DayName_pl[3] = "środa"
    DayName_pl[4] = "czwartek"
    DayName_pl[5] = "piątek"
    DayName_pl[6] = "sobota"
    
    DayName_en = new Array(7)
    DayName_en[0] = "sunday"
    DayName_en[1] = "monday"
    DayName_en[2] = "tuesday"
    DayName_en[3] = "wednesday"
    DayName_en[4] = "thursday"
    DayName_en[5] = "friday"
    DayName_en[6] = "saturday"


    MonthName_pl = new Array(12)
    MonthName_pl[0] = "stycznia"
    MonthName_pl[1] = "lutego"
    MonthName_pl[2] = "marca"
    MonthName_pl[3] = "kwietnia"
    MonthName_pl[4] = "maja"
    MonthName_pl[5] = "czerwca"
    MonthName_pl[6] = "lipca"
    MonthName_pl[7] = "sierpnia"
    MonthName_pl[8] = "września"
    MonthName_pl[9] = "października"
    MonthName_pl[10] = "listopada"
    MonthName_pl[11] = "grudnia"
    
    MonthName_en = new Array(12)
    MonthName_en[0] = "january"
    MonthName_en[1] = "february"
    MonthName_en[2] = "march"
    MonthName_en[3] = "april"
    MonthName_en[4] = "may"
    MonthName_en[5] = "june"
    MonthName_en[6] = "july"
    MonthName_en[7] = "august"
    MonthName_en[8] = "september"
    MonthName_en[9] = "october"
    MonthName_en[10] = "november"
    MonthName_en[11] = "december"


    function getDateStr_pl() {
      var Today = new Date()
      var WeekDay = Today.getDay()
      var Month = Today.getMonth()
      var Day = Today.getDate()
      var Year = Today.getFullYear()

      if(Year <= 99)
      Year += 1900

      return DayName_pl[WeekDay] + "," + " " + Day + " " + MonthName_pl[Month] + ", " + Year
    }
    
    
    function getDateStr_en() {
      var Today = new Date()
      var WeekDay = Today.getDay()
      var Month = Today.getMonth()
      var Day = Today.getDate()
      var Year = Today.getFullYear()

      if(Year <= 99)
      Year += 1900

      return DayName_en[WeekDay] + "," + " " + Day + " " + MonthName_en[Month] + ", " + Year
    }
    
    
    //-->






$(function() {
	//$('a.lightbox').lightBox(); // Select all links with lightbox class
        
    var _speed = 2000;
    var _stepCount = 6;
    var _interval = _speed*_stepCount;
    
    $('.fadingText').css('opacity', '0.0');
    
    var fadeEff = function() {
        
         //alert('t');
        
        $('#s1').animate({ opacity: '1.0' }, _speed, function() {
        
           $('#s2').animate({ opacity: '1.0' }, _speed, function() {
           
               $('#s3').animate({ opacity: '1.0' }, _speed, function() {
               
                   $('#s1').animate({ opacity: '0.0' }, _speed, function() {
                   
                       $('#s2').animate({ opacity: '0.0' }, _speed, function() {
                       
                           $('#s3').animate({ opacity: '0.0' }, _speed);
                       
                       });
                   
                   });
                   
               });
               
           });
            
        });
        
    };
    
    var holdInterval = setInterval(fadeEff, _interval);
    
    fadeEff();
    
});