function toggle_CB(responseXML, x) {
    var state = responseXML.getElementsByTagName('state')[0].firstChild.data;
    var act = responseXML.getElementsByTagName('action')[0].firstChild.data;
    var iid =  responseXML.getElementsByTagName('id')[0].firstChild.data;
    var y = document.createElement('a');
    y.href = "#";
    y.className = "toggle" + act;
    y.id = act + "-" + iid;
    y.innerHTML = state;
    y.onclick = toggle;
    var z = x.parentNode;
    z.replaceChild(y, x);
    if(act == 'read') {
        var item = document.getElementById('item-'+iid);
        var re = new RegExp("(^| )titlebar( |$)");
        for (i=0; i<item.childNodes.length; i++) {
            if(item.childNodes[i].className && item.childNodes[i].className.match(re)) {
                tbar = item.childNodes[i];
            }
        }
        if(state == 'nepřečtené')
            tbar.style['background'] = 'url(https://www.scienceweek.cz/img/slashed3.gif)';
        else {
            tbar.style['background'] = '#fff';
        }
    }
    if(act == 'check') {
        var item = document.getElementById('ititle-'+iid);
        if(state == 'povolit')
            item.style['color'] = 'red';
        else {
            item.style['color'] = 'black';
        }
    }
}

function toggle(e) {
    // Cancel the submit event, and find out which item was submitted
    knackerEvent(e);
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if (!target) return;
    var act;
    if(target.id.substring(0,5) == 'read-') act = 'read';
    else if(target.id.substring(0,5) == 'check') act = 'check';
    else act = 'save';
    var iid = target.id.substring(5, target.id.length);
	if (act == 'check') {
		iid = target.id.substring(6, target.id.length);
	}
    // Check if this target is already in the process of being submitted. 
    // If so, don't allow it to be submitted again.
    if (target.ajaxInProgress) return;

    // Set up the request
    var xmlhttp =  new XMLHttpRequest();
    xmlhttp.open('POST', 'https://www.scienceweek.cz/headlines.php', true);

    // The callback function
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
          if (xmlhttp.status == 200) {
                toggle_CB(xmlhttp.responseXML, target);
                target.ajaxInProgress = false;
          } else {
          }
        }
    }

    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('act=toggle' + act + '&ajax=true&iid_=' + iid);

    // Add temporary feedback that the request has been sent
    var loadingImg = document.createElement('img');
    loadingImg.src = 'https://www.scienceweek.cz/img/working.gif';
    loadingImg.className = 'waiting';
    target.innerHTML = " ";
    target.appendChild(loadingImg);
    target.ajaxInProgress = true;
}

function markread(e) {
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if (!target) return;
    if(target.id.substring(0,4) == 'ext-') {
        var iid = target.id.substring(4, target.id.length);
    } else return;
    var item = document.getElementById('item-'+iid) ;
    var i;
    var re = new RegExp("(^| )titlebar( |$)");
    for (i=0; i<item.childNodes.length; i++) {
        if(item.childNodes[i].className && item.childNodes[i].className.match(re)) {
            tbar = item.childNodes[i];
            break;
        }
    }
    // Check if this target is already in the process of being submitted. 
    // If so, don't allow it to be submitted again.
    if (target.ajaxInProgress) return;

    // Set up the request
    var xmlhttp =  new XMLHttpRequest();
    xmlhttp.open('POST', 'https://www.scienceweek.cz/headlines.php', true);

    // The callback function
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
          if (xmlhttp.status == 200) {
                tbar.style['background'] = 'url(https://www.scienceweek.cz/img/slashed3.gif)';
                readcontrol = document.getElementById("read-"+iid);
                readcontrol.innerHTML = "nepřečtené";
                target.ajaxinProgress = false;
          } else {
          }
        }
    }

    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('act=markread&ajax=true&iid_=' + iid);
    target.ajaxinProgress = true;
}

function editItem_(e) {
    knackerEvent(e);
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if (!target) return;
    // Check if this target is already in the process of being submitted. 
    // If so, don't allow it to be submitted again.
    if (target.ajaxInProgress) return;

    if(target.id.substring(0,5) == 'edit-') {
        var iid = target.id.substring(5, target.id.length);
    } else return;
    var wrap = document.createElement('span');
    wrap.id = 'iedit-' + iid;
    var loadingImg = document.createElement('img');
    loadingImg.src = 'https://www.scienceweek.cz/img/working.gif';
    loadingImg.className = 'waiting';
    wrap.appendChild(loadingImg);
    var y = target.parentNode;
    y.replaceChild(wrap, target);

    // Set up the request
    var xmlhttp =  new XMLHttpRequest();
    xmlhttp.open('POST', 'https://www.scienceweek.cz/headlines.php', true);

    // The callback function
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
          if (xmlhttp.status == 200) {
                var ititle = xmlhttp.responseXML.getElementsByTagName('ititle')[0].firstChild.nodeValue;
                var idescription = xmlhttp.responseXML.getElementsByTagName('idescription')[0].firstChild.nodeValue;
                var ilink = xmlhttp.responseXML.getElementsByTagName('ilink')[0].firstChild.nodeValue;
                wrap.innerHTML = "...";
                addEditItemForm(iid, ititle, idescription, ilink);
                target.ajaxinProgress = false;
          } else {
          }
        }
    }

    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('act=edit&ajax=true&iid_=' + iid);
    target.ajaxinProgress = true;
}

function submit_item(submit, iid) {
    var istatus = document.getElementById("istatus-" + iid);
    if (istatus.ajaxInProgress) return;

    if(submit == 0) {
    // Do not submit item
        istatus.innerHTML = "";
        var z = document.getElementById('iedit-'+iid);
        var y = z.parentNode;
        var x = document.createElement('a');
        x.href = "#";
        x.id = "edit-" + iid;
        x.onclick = editItem_;
        x.innerHTML = "edit";
        y.replaceChild(x, z);
        return;    
    }

    var ititle = document.getElementById('tfield-' + iid);
    var ilink = document.getElementById('lfield-' + iid);
    var idesc = document.getElementById('dfield-' + iid);

    // Set up the request
    var xmlhttp =  new XMLHttpRequest();
    xmlhttp.open('POST', 'https://www.scienceweek.cz/headlines.php', true);
    // The callback function
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
          if (xmlhttp.status == 200) {
                // Reset Item
                istatus.innerHTML = "";
                // Should check here to make sure things went okay
                var z = document.getElementById('iedit-'+iid);
                var y = z.parentNode;
                var x = document.createElement('a');
                x.href = "#";
                x.id = "edit-" + iid;
                x.onclick = editItem_;
                x.innerHTML = "edit";
                y.replaceChild(x, z);
                // Update item
                html_title = document.getElementById("title-"+iid);
                html_ext = document.getElementById("ext-"+iid);
                html_excerpt = document.getElementById("excerpt-"+iid);
                html_title.innerHTML = ititle.value;
                html_ext.href = ilink.value;
                html_excerpt.innerHTML = idesc.value;
                istatus.ajaxInProgress = false;
          } else {
          }
        }
    }
    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('act=edit-confirmed&ajax=true&iid_=' + iid + '&ititle=' + escape(ititle.value) + '&idescription=' + escape(idesc.value) + '&ilink=' + escape(ilink.value));
    
    // Add temporary feedback that the request has been sent
    var loadingImg = document.createElement('img');
    loadingImg.src = 'https://www.scienceweek.cz/img/working.gif';
    loadingImg.className = 'waiting';
    edit_ = document.getElementById('iedit-' + iid);
    edit_.replaceChild(loadingImg, edit_.firstChild);
    istatus.ajaxInProgress = true;
}

function addEditItemForm(iid, ititle, idescription, ilink) {
    // the istatus container
    var istatus = document.getElementById("istatus-" + iid);

    var title_ = document.createElement('input');
    title_.className = 'txtbox';
    title_.id = 'tfield-' + iid;
    title_.type = 'text';
    title_.value = ititle;
    title_.style['width'] = '100%';
    var link_ = document.createElement('input');
    link_.className = 'txtbox';
    link_.id = 'lfield-' + iid;
    link_.type = 'text';
    link_.value = ilink;
    link_.style['width'] = '100%';
    var desc_ = document.createElement('textarea');
    desc_.className = 'txtbox';
    desc_.id = 'dfield-' + iid;
    desc_.rows = 6;
    desc_.value = idescription;
    desc_.style['width'] = '100%';

    var txt1 = document.createElement('h3');
    txt1.innerHTML = 'Edit Item';
    var tlabel = document.createElement('label');
    tlabel.innerHTML = 'title';
    var llabel = document.createElement('label');
    llabel.innerHTML = 'link';
    var dlabel = document.createElement('label');
    dlabel.innerHTML = 'description';
    
    // submit link
    var submit = document.createElement("button");
    submit.id = 'submit-' + iid;
    submit.value = 'submit';
    submit.innerHTML = 'submit';
    submit.setAttribute("href","#");
    submit.setAttribute("onclick","submit_item(1, " + iid + "); return false;");
    // cancel link
    var cancel = document.createElement("button");
    cancel.style.margin="0 0 0 0.5em";
    cancel.value = 'cancel';
    cancel.innerHTML = "cancel";
    cancel.setAttribute("href","#");
    cancel.setAttribute("onclick","submit_item(0, " + iid + "); return false;");
    // button wrapper p
    var but_wrap = document.createElement("p");
    but_wrap.appendChild(submit);
    but_wrap.appendChild(cancel);

    istatus.appendChild(txt1);
    istatus.appendChild(tlabel);
    istatus.appendChild(title_);
    istatus.appendChild(llabel);
    istatus.appendChild(link_);
    istatus.appendChild(dlabel);
    istatus.appendChild(desc_);
    istatus.appendChild(but_wrap);
}

function deleteItem_(e) {
    knackerEvent(e);
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if (!target) return;
    if(target.id.substring(0,7) == 'delete-') {
        var iid = target.id.substring(7, target.id.length);
    } else return;
    var y = target.parentNode;
    y.removeChild(target);
    var wrap = document.createElement('span');
    wrap.id = 'dwrap-' + iid;
    var x = document.createElement('span');
    x.innerHTML = 'are you sure ? ';
    x.style['color'] = "#A0441D";
    var lnk_no = document.createElement('a');
    lnk_no.href = "#";
    lnk_no.id = "nodelete-" + iid;
    lnk_no.onclick = deleteItem;
    lnk_no.innerHTML = "no";
    var lnk_yes = document.createElement('a');
    lnk_yes.href = "#";
    lnk_yes.id = "delete-" + iid;
    lnk_yes.onclick = deleteItem;
    lnk_yes.innerHTML = "yes";
    wrap.appendChild(x);
    wrap.appendChild(lnk_no);
    wrap.appendChild(document.createTextNode(' '));
    wrap.appendChild(lnk_yes);
    y.appendChild(wrap);
}

function deleteItem(e) {
    knackerEvent(e);
    var target = window.event ? window.event.srcElement : e ? e.target : null;
    if (!target) return;
    if(target.id.substring(0,7) == 'delete-') {
        var iid = target.id.substring(7, target.id.length);
    } else if (target.id.substring(0,9) == 'nodelete-') {
        var iid = target.id.substring(9, target.id.length);
        var z = document.getElementById('dwrap-'+iid);
        var y = z.parentNode;
        y.removeChild(z);
        var x = document.createElement('a');
        x.href = "#";
        x.id = "delete-" + iid;
        x.onclick = deleteItem_;
        x.innerHTML = "delete";
        y.appendChild(x);
        return;        
    } else return;
    var item = document.getElementById('item-'+iid) ;
    var i;
    var re = new RegExp("(^| )titlebar( |$)");
    for (i=0; i<item.childNodes.length; i++) {
        if(item.childNodes[i].className && item.childNodes[i].className.match(re)) {
            tbar = item.childNodes[i];
            break;
        }
    }

    // Check if this target is already in the process of being submitted. 
    // If so, don't allow it to be submitted again.
    if (target.ajaxInProgress) return;

    // Set up the request
    var xmlhttp =  new XMLHttpRequest();
    xmlhttp.open('POST', 'https://www.scienceweek.cz/headlines.php', true);

    // The callback function
    xmlhttp.onreadystatechange = function() {
        if (xmlhttp.readyState == 4) {
          if (xmlhttp.status == 200) {
                var z = document.getElementById('dwrap-'+iid);
                var y = z.parentNode;
                y.removeChild(z);
                var x = document.createElement('span');
                x.className = "brightish";
                x.innerHTML = "deleted";
                y.appendChild(x);
          } else {
          }
        }
    }

    // Send the POST request
    xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xmlhttp.send('act=delete&ajax=true&iid_=' + iid);

    // Add temporary feedback that the request has been sent
    var loadingImg = document.createElement('img');
    loadingImg.src = 'https://www.scienceweek.cz/img/working.gif';
    loadingImg.className = 'waiting';
    var z = document.getElementById('dwrap-'+iid);
    z.innerHTML = " ";
    z.appendChild(loadingImg);
    z.ajaxInProgress = true;
}

var hl_controls = {
	'a.togglesave' : function(target) {
		target.onclick = toggle;
	},

	'a.togglecheck' : function(target) {
		target.onclick = toggle;
	},

	'a.toggleread' : function(target) {
		target.onclick = toggle;
	},
    
	'a.deleteitem' : function(target) {
		target.onclick = deleteItem_;
	},

	'a.edititem' : function(target) {
		target.onclick = editItem_;
	}

    };

if(document.getElementById && Sarissa) {
    Behaviour.register(hl_controls);
}