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.jmeno.value=="") {
    alert("Fill in your name, please");
    formular.jmeno.focus();
    return false;
  }
  else if (formular.vzkaz.value=="") {
    alert("Fill in your commentary, please");
    formular.vzkaz.focus();
    return false;
  }
  

  else {
    return true;
  }
}