function URLencode(url)
{
    return escape(url);
}

function i2buttonClick(form, field, value, confirm)
{
    if ( (!confirm) || i2confirm() ) {
        form.elements[field].value = value;
        form.submit();
        return true;
    }
    return false;
}

function i2submitClick(formid, field, value, confirm)
{
    var form = document.getElementById(formid);
    return i2buttonClick(form, field, value, confirm);
}

function i2confirm(msg)
{
    if (msg == undefined) {
        msg = 'Potvrďte akci.';
    }
    return window.confirm(msg);
}

function activeRadioButton(id, numberid) {
    document.getElementById(id + numberid).checked = "1";
}

function i2SwitchVisible(id)
{
    var e = document.getElementById(id);
    if (e.style.display == 'none') {
        e.style.display = 'block';
    } else {
        e.style.display = 'none';
    }
}

function i2SwitchCheckBox(id)
{
    var e = document.getElementById(id);
    e.checked = ! e.checked;
}

function i2_checkbox_click(cb)
{
    cb.checked = ! cb.checked;
}

function i2_set_cookie(name, value) {
    document.cookie = name+"="+escape(value)+";path=/";
}

function i2_get_cookie(name) {
    var start = document.cookie.indexOf(name+"=");
    var len = start+name.length+1;
    if ( (!start) && (name != document.cookie.substring(0, name.length)) ) {
        return null;
    }
    if ( start == -1 ) return null;
    var end = document.cookie.indexOf( ";", len );
    if ( end == -1 ) end = document.cookie.length;
    return unescape(document.cookie.substring(len, end));
}

function i2_check_upload(frm,rege){
    var fn = frm.file.value;
    if ( fn == "" ) {
        alert('Není zadán žádný soubor.');
        return false;
    }
    if ( fn.match(rege) || fn.match(/.zip$/i) ) {
        return true;
    }
    alert('Špatný typ souboru');
    return false;
}


var menuids=["popupmenu"]

function i2_popupmenu_horizontal(){
    for (var i=0; i<menuids.length; i++){
        var ultags=document.getElementById(menuids[i]).getElementsByTagName("ul")
        for (var t=0; t<ultags.length; t++){
            if (ultags[t].parentNode.parentNode.id==menuids[i]){
                ultags[t].style.top=(ultags[t].parentNode.offsetHeight)-1+"px"
            } else {
                ultags[t].style.left=(ultags[t-1].getElementsByTagName("a")[0].offsetWidth)-1+"px"
            }
            ultags[t].parentNode.onmouseover=function(){
                this.getElementsByTagName("ul")[0].style.visibility="visible"
            }
            ultags[t].parentNode.onmouseout=function(){
                this.getElementsByTagName("ul")[0].style.visibility="hidden"
            }
        }
    }
}


function i2_switchimg(imgid, newsrc,newalt) {
    img = document.getElementById(imgid);
    img.src = newsrc;
    img.alt = newalt;
}


function i2_redirectUrlBySelect(selectid) {
    var options = document.getElementById(selectid).getElementsByTagName("option");

    for (var t=0; t<options.length; t++) {
        if (options[t].selected == true) {
            i2_redirectToUrl(options[t].value);
        }
    }
}


function i2_redirectToUrl(url) {
    window.location = url;
}


function openTree(li) {
    var ul = li.parentNode.getElementsByTagName('ul');
    ul = ul[0];
    if (!ul) return;
    var style = ul.style.display;
    if (style == 'block') style = 'none';
    else style = 'block';
    ul.style.display = style;
}


function controlSelectedValue(select, failtxt) {
    if (select.value == 'notavailable') {
        alert(failtxt);
        options = select.getElementsByTagName('option');
        select.value = options[0].value;
    }
}


function makeCheck(span) {
  var check = span.parentNode.getElementsByTagName('input');
  for (var i=0;i<check.length;i++) {
      if ( (check[i].type == "checkbox") && (!check[i].disabled) ) {
          if (check[i].checked) {
              check[i].checked = false;
          } else {
              check[i].checked = true;
          }
      }
  }
}


function i2_priceSetNoTax(current, id, tax)
{
    if (tax == null) tax = 1.19;
    var cp = strtr(current.value, {' ' : ''});
    var newp = cp/tax;
    if (is_number(cp)) {
        if (newp%1) {
            newp = Math.round(newp);
        }
        document.getElementById(id).value = newp;
    } else {
        alert("Zadaná hodnota je nekorektní a nelze s ní počítat cenu s DPH");
    }
}


function i2_priceSetTax(current, id, tax)
{
    if (tax == null) tax = 1.19;
    var cp = strtr(current.value, {' ' : ''});
    var newp = cp*tax;
    if (is_number(cp)) {
        if (newp%1) {
            newp = Math.round(newp);
        }
        document.getElementById(id).value = newp;
    } else {
        alert("Zadaná hodnota je nekorektní a nelze s ní počítat cenu s DPH");
    }
}


function is_number(sText)
{
   var ValidChars = "0123456789.";
   var IsNumber=true;
   var Char;

   for (i = 0; i < sText.length && IsNumber == true; i++) { 
       Char = sText.charAt(i); 
       if (ValidChars.indexOf(Char) == -1) {
           IsNumber = false;
       }
    }
    return IsNumber;
   
}

function strtr(str, from, to) {

    var fr = '', i = 0, lgth = 0;
 
    if (typeof from === 'object') {
        for (fr in from) {
            str = str.replace(fr, from[fr]);
        }
        return str;
    }
    lgth = to.length;
    if (from.length < to.length) {
        lgth = from.length;
    }
    for (i = 0; i < lgth; i++) {
        str = str.replace(from[i], to[i], 'g');
    }
    
    return str;
}