var jsDOM0 = (document.all);
var jsDOM1 = (document.getElementById);
var jsDOM = jsDOM0 || jsDOM1;

function getObj (name) {
    if (typeof name == "object") return name;
    if (jsDOM1) return document.getElementById(name);
    if (jsDOM0) return eval('document.all.'+name);
    else return null;
}

function getObjCSSProp(obj,prop) {
    var x;
    if (obj.style) x=eval("obj.style."+prop); else x=null;
    return x;
}

function setObjCSSProp(obj,prop,val) {
    var x=eval("obj.style."+prop+"='"+val+"'");
    return obj;
}

function getObjDisplayed(obj) {
    var x = getObjCSSProp(obj,'display'); x=(x!='none');
    return x;
}

function setObjDisplayed(obj,show) {
    return setObjCSSProp(obj,'display',(show)?'block':'none');
}



function OnOffObj(name) {
    if (name) {
        var obj = getObj (name);
        submenus = obj.getElementsByTagName("ul")
        for (var i = 0; i<submenus.length; i++) {
            x = getObjDisplayed(submenus[i]);
            y = (x == true ? 0 : 1);
//             hideAllBut(name);
            setObjDisplayed(submenus[i],y);
        }
    }
}

function kontrola(formular) {

  if (formular.zprava.value=="") {
    alert("Vyplňte text zprávy");
    formular.zprava.focus();
    return false;
  }
  else if (window.RegExp) {
    re = new RegExp("^[^@]+@[^.]+\..+$");
    if (!re.test(formular.email.value)) {
      alert("Vyplňte email ve správném formátu");
      formular.email.focus();
      return false;
    }
  }

  else {
    return true;
  }
}

function otevri_okno(id) {
  document.getElementById(id).style.display='block';
  return false;
}

function zavri_okno(id) {
  document.getElementById(id).style.display='none';
  return false;
}

function prepniPuvodRamecek(num) {
  /*var obal = document.getElementById('ramecekObsahyObal');
  var obsahy = obal.getElementsByTagName('div');
  var pocet = obsahy.length;*/
  
  document.getElementById('ramecekDruhy').style.backgroundImage = "url('../images/ramecek_bily.png')";
  document.getElementById('ramecekDruhyObsah').innerHTML = document.getElementById('obsah_' + num).innerHTML;
}

function prepniOdpovednostRamecek(num) {

  document.getElementById('ramecekPrincipy').style.backgroundImage = "url('../images/odpovednost-ramecek-"+num+".png')";
  document.getElementById('ramecekPrincipyObsah').innerHTML = document.getElementById('obsah_' + num).innerHTML;
  document.getElementById('ramecekPrincipyPaticka').className = 'odpovednost-barva-' + num;
  document.getElementById('ramecekPrincipyPatickaLink').className = 'odpovednost-barva-' + num;

  odkazy = document.getElementById('odpovednostRozcestnik').getElementsByTagName('a');
  for (var i = 0; i < odkazy.length; i++) {
    odkazy[i].className='';
    var j = num-1;
    if (i==j) {
      odkazy[j].className='active';
    }
  }

}