function Fade(Id, Val, To)
{  
    Elm = document.getElementById(Id);
    Val += 5 * To;
        
    if (navigator.appName.indexOf("Microsoft") != -1)
        Elm.style.filter = 'alpha(opacity='+Val+')';
    else if (Elm.style.MozOpacity)
        Elm.style.MozOpacity = (Val / 100);
    else Elm.style.opacity = (Val / 100);
        
    if ((Val > 0) && (Val < 100))
        setTimeout('Fade(\''+Id+'\', '+Val+', '+To+')', 40);    
} 

var PrevCal = 0;

function selCal(Id)
{
    document.getElementById('calt'+PrevCal).className = 'calt';
    document.getElementById('cald'+PrevCal).style.display = 'none';
    PrevCal = Id;
    document.getElementById('calt'+Id).className = 'calts';
    document.getElementById('cald'+Id).style.display = 'block';
    Fade('cald'+Id, 0, 1);
}

function textCounter(field, maxlimit) 
{
    if (field.value.length > maxlimit) 
        field.value = field.value.substring(0, maxlimit);
    else 
        document.getElementById('txtcnt').innerHTML = "Napísaných znakov <b>" + field.value.length + "</b> z <b>" + maxlimit + "</b>";
}

var ClearTextArea = false;
function OpytajsaClear(Elm)
{
    if (!ClearTextArea)
    { 
        Elm.value = '';
        ClearTextArea = true;
    }
}

var Vdn_Anim_imgs = new Array();
var Vdn_Anim_del = 5000;
var Vdn_Anim_auto = true;

function Vdn_Anim_start(ArrId)
{    
    for (var i = 0; i < ArrId.length; i++)
    {
        Vdn_Anim_imgs[i] = new Image;
        Vdn_Anim_imgs[i].src = ArrId[i];  
    }
             
    var Res = '';                                                                             
    for (var i = 0; i < Vdn_Anim_imgs.length; i++)
        Res += '<div class="topsimg" style=" margin-top : '+(5 + 56*i)+'px;"><img src="'+Vdn_Anim_imgs[i].src+'" alt="" onclick="Vdn_Anim_click('+i+')" /></div>';
    
    Res += '<img src="'+Vdn_Anim_imgs[0].src+'" alt="" id="Vdn_Anim_img1" style="position : absolute;" />';
    Res += '<img src="'+Vdn_Anim_imgs[0].src+'" alt="" id="Vdn_Anim_img2" />';
    
    document.write(Res);
   
    setTimeout('Vdn_Anim_loop(1)', Vdn_Anim_del);
}

function Vdn_Anim_click(Image)
{
    Vdn_Anim_auto = false;  
    var Elm1 = document.getElementById('Vdn_Anim_img1');
    var Elm2 = document.getElementById('Vdn_Anim_img2');
    Elm2.src = Elm1.src;    
    Elm1.src = Vdn_Anim_imgs[Image].src;
    Fade('Vdn_Anim_img1', 0, 1)      
}

function Vdn_Anim_loop(Image)
{     
    if (Vdn_Anim_auto)
    {
        var Elm1 = document.getElementById('Vdn_Anim_img1');
        var Elm2 = document.getElementById('Vdn_Anim_img2');
        Elm2.src = Elm1.src;    
        Elm1.src = Vdn_Anim_imgs[Image].src;
        Fade('Vdn_Anim_img1', 0, 1)      
        Image++; if (Image > Vdn_Anim_imgs.length) Image = 0;
        setTimeout('Vdn_Anim_loop('+Image+')', Vdn_Anim_del);
    }
}