function upologiste(type) {
   
    if (type == "upologiste") {
        var Lekt = document.getElementById("upologisteLek");
        var Select = document.getElementById("upologisteSel");
        
        opacity('upologisteLek', 100, 0, 500);
        opacity('upologisteSel', 0, 100, 500);
        Lekt.style.display = "none";
        Select.style.display = "block";
        
       
    } else if (type == "online") {
        var Lekt = document.getElementById("onlineLekt");
        var Select = document.getElementById("onlineSel");
        
        opacity('onlineLekt', 100, 0, 500);
        opacity('onlineSel', 0, 100, 500);
        Lekt.style.display = "none";
        Select.style.display = "block";
    } else if (type == "upologisteInside") {
        var Lekt = document.getElementById("upologisteLekInside");
        var Select = document.getElementById("upologisteSelInside");
        
        opacity('upologisteLekInside', 100, 0, 500);
        opacity('upologisteSelInside', 0, 100, 500);
        Lekt.style.display = "none";
        Select.style.display = "block";
    } else if (type == "onlineInside") {
        var Lekt = document.getElementById("onlineLektInside");
        var Select = document.getElementById("onlineSelInside");
        
        opacity('onlineLektInside', 100, 0, 500);
        opacity('onlineSelInside', 0, 100, 500);
        Lekt.style.display = "none";
        Select.style.display = "block";
    }
    
}
function opacity(id, opacStart, opacEnd, millisec) {
    var speed = Math.round(millisec / 100);
    var timer = 0;

    if(opacStart > opacEnd) {
        for(i = opacStart; i >= opacEnd; i--) {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    } else if(opacStart < opacEnd) {
        for(i = opacStart; i <= opacEnd; i++)
            {
            setTimeout("changeOpac(" + i + ",'" + id + "')",(timer * speed));
            timer++;
        }
    }
}

function changeOpac(opacity, id) {
    var object = document.getElementById(id).style;
    object.opacity = (opacity / 100);
    object.MozOpacity = (opacity / 100);
    object.KhtmlOpacity = (opacity / 100);
    object.filter = "alpha(opacity=" + opacity + ")";
}