// JavaScript Document
function rozbal(idecko){
  el=document.getElementById(idecko).style;
  el.display=(el.display == 'block')?'none':'block';
}
function rozbal_reseni(idecko){
  $("#res-"+idecko).show("slow");
  $("#tlacitko-"+idecko).hide("slow");
  /*el = document.getElementById("res-"+idecko)
  el.style.display='block';
  el = document.getElementById("tlacitko-"+idecko)
  el.style.display='none';
  */
  posliPriklad(idecko);
}

function zmenobrazek(obrazekid, sekceid) {
  obrazek = document.getElementById(obrazekid);
  sekce = document.getElementById(sekceid);
  if(sekce.style.display == 'block') {
  	obrazek.src = 'images/minus.gif';
  }
  else {
	obrazek.src = 'images/plus.gif';
  }
}




function zobrazSkryj(idecko){
    el=document.getElementById(idecko).style;
    el.display=(el.display == 'block')?'none':'block';
}

function insertAtCursor(obj, val){
    var o = document.getElementById(obj);
    o.focus();
    if (document.selection){
        sel = document.selection.createRange();
        sel.text = val;
        }
    else if (o.selectionStart || o.selectionStart == '0'){
        var startPos = o.selectionStart;
        var endPos = o.selectionEnd;
        o.value = o.value.substring(0,startPos) + val + o.value.substring(endPos, o.value.length);
        }
    else{
        o.value += val;
        }
    }


function insertAroundSelection(obj,startVal,endVal) {
    var o = document.getElementById(obj);
    o.focus();
    if (document.selection) {
        sel = document.selection.createRange();
        var selText = sel.text;
        sel.text = startVal + selText + endVal;
        
        }
    else if (o.selectionStart || o.selectionStart == '0') {
        var startPos = o.selectionStart;
        var endPos = o.selectionEnd;
        o.value = o.value.substring(0,startPos) + startVal + o.value.substring(startPos,endPos) + endVal + o.value.substring(endPos,o.value.length);
        }
    else {
        o.value += startVal + endVal;
        }
    }

window.onload = function(){
    if (zXmlHttp.isSupported()){
        var email = document.getElementById("email_");
        email.onchange = validateField;
        email.onkeyup = validateField;
        var jmeno = document.getElementById("jmeno_");
        jmeno.onchange = validateField;
        jmeno.onkeyup = validateField;
        var heslo = document.getElementById("heslo_");
        heslo.onchange = validateField;
        heslo.onkeyup = validateField;
        var heslo2 = document.getElementById("heslo_2");
        heslo2.onchange = validateField;
        heslo2.onkeyup = validateField;
        validateField(1);
        }
    }
function validateField(oEvent) {
    var email = document.getElementById("email_");
    var jmeno = document.getElementById("jmeno_");
    var heslo = document.getElementById("heslo_");
    var heslo2 = document.getElementById("heslo_2");
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "kontrola-emailu.php?email="+encodeURIComponent(email.value)+"&jmeno=" + encodeURIComponent(jmeno.value)+"&heslo=" + encodeURIComponent(heslo.value)+"&heslo2=" + encodeURIComponent(heslo2.value), true);
    oXmlHttp.onreadystatechange = function (){
        if (oXmlHttp.readyState == 4){
            if (oXmlHttp.status == 200){
                var arrInfo = oXmlHttp.responseText.split("||");
                var zprava = document.getElementById("zprava");
                var submit = document.getElementById("submit_");
                zprava.innerHTML = arrInfo[1];
                if (!eval(arrInfo[0])){
                    zprava.style.color = "red";
                    submit.disabled = "disabled";
                    }
                else{
                    zprava.style.color = "green";
                    submit.disabled = "";
                    }
                } 
            
            }
        };
    oXmlHttp.send(null);
    };
function posliPriklad(id) {
    var oXmlHttp = zXmlHttp.createRequest();
    oXmlHttp.open("get", "pricti_priklad.php?id="+id, true);
    oXmlHttp.onreadystatechange = function (){
        if (oXmlHttp.readyState == 4){
            if (oXmlHttp.status == 200){
                1;
                } 
            
            }
        };
    oXmlHttp.send(null);
    };
    
function getRequestBody(oForm){
    var aParams = new Array();
    for (var i=0; i < oForm.elements.length; i++){
        var oField = oForm.elements[i];
        switch(oField.type){
            case "button":
            case "submit":
            case "reset":
                break
            case "radio":
                aParams.push(encodeNameAndValue(oField.name, oField.value));
                break;
            case "checkbox":            
            case "text":
            case "hidden":
            case "password":
                aParams.push(encodeNameAndValue(oField.name, oField.value));
                break;
            default:
                switch(oField.tagName.toLowerCase()){
                    case "select":
                        aParams.push(encodeNameAndValue(oField.name, oField.options[oField.selectedIndex].value));
                        break
                    default:
                        aParams.push(encodeNameAndValue(oField.name, oField.value));
                    }
            }
        }
    return aParams.join("&");
    }
function encodeNameAndValue(sName, sValue){
    var sParam = encodeURIComponent(sName);
    sParam += "=";
    sParam += encodeURIComponent(sValue);
    return sParam;
    }
function schovej(){
    var zprava = document.getElementById("zprava");
    zprava.style.display = "none";
    }
function uloz_clanek(){
    var zprava = document.getElementById("zprava");
    zprava.style.display = "";
    var form = document.forms[0];
    var sBody = getRequestBody(form);
    var oXHR = zXmlHttp.createRequest();
    oXHR.open("post", form.action, true);
    oXHR.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    oXHR.onreadystatechange = function (){
        if (oXHR.readyState == 4){
            if (oXHR.status == 200){
                zprava.style.color = "green";
                zprava.innerHTML = "Uložení proběhlo v pořádku";
                setTimeout(schovej, 2000);
                }
            else{
                zprava.style.color = "red";
                zprava.innerHTML = "Uložení nebylo dokončeno. Zkuste opakovat akci.";
                setTimeout(schovej, 2000);
                }
            }
            
        }
    oXHR.send(sBody);
    }