/* Zuständig für Aktionen in Texteingabefeldern */

function EnterField(ElementId, DefaultText)
{   
var InputObject = document.getElementById(ElementId);

    if(InputObject.value == DefaultText)
    {
         InputObject.value = '';
         InputObject.style.color = 'black';
    } 
}

function LeaveField(ElementId, DefaultText)
{
var InputObject = document.getElementById(ElementId);

    if(InputObject.value == '' || InputObject.value == DefaultText)
    {
         InputObject.value = DefaultText;
         InputObject.style.color = '#b5b5b5';
    }
    else{
        InputObject.style.color = 'black';
    }
}





function InsertTag(aTag, eTag, elementID) {
  var input = document.getElementById(elementID);
  input.focus();
  /* für Internet Explorer */
  if(typeof document.selection != 'undefined') {
    /* Einfügen des Formatierungscodes */
    var range = document.selection.createRange();
    var insText = range.text;
    range.text = aTag + insText + eTag;
    /* Anpassen der Cursorposition */
    range = document.selection.createRange();
    if (insText.length == 0) {
      range.move('character', -eTag.length);
    } else {
      range.moveStart('character', aTag.length + insText.length + eTag.length);
    }
    range.select();
  }
  /* für neuere auf Gecko basierende Browser */
  else if(typeof input.selectionStart != 'undefined')
  {
    /* Einfügen des Formatierungscodes */
    var start = input.selectionStart;
    var end = input.selectionEnd;
    var insText = input.value.substring(start, end);
    input.value = input.value.substr(0, start) + aTag + insText + eTag + input.value.substr(end);
    /* Anpassen der Cursorposition */
    var pos;
    if (insText.length == 0) {
      pos = start + aTag.length;
    } else {
      pos = start + aTag.length + insText.length + eTag.length;
    }
    input.selectionStart = pos;
    input.selectionEnd = pos;
  }
  /* für die übrigen Browser */
  else
  {
    /* Abfrage der Einfügeposition */
    var pos;
    var re = new RegExp('^[0-9]{0,3}$');
    while(!re.test(pos)) {
      pos = prompt("Einfügen an Position (0.." + input.value.length + "):", "0");
    }
    if(pos > input.value.length) {
      pos = input.value.length;
    }
    /* Einfügen des Formatierungscodes */
    var insText = prompt("Bitte geben Sie den zu formatierenden Text ein:");
    input.value = input.value.substr(0, pos) + aTag + insText + eTag + input.value.substr(pos);
  }
}



window.strgIsPressed = false;

function keydownHandler(ev) {
   ev = ev || window.event;
   var key = ev.which || ev.keyCode || ev.charCode;
   if (key === 17) { window.strgIsPressed = true; }
   else if (window.strgIsPressed && key === 13) { InsertTag('<br/>', '','htmlcontent'); }
}

function keyupHandler(ev) {
   ev = ev || window.event;
   var key = ev.which || ev.keyCode || ev.charCode;
   if (key === 17) { window.strgIsPressed = false; }
}

document.onkeydown = keydownHandler
document.onkeyup = keyupHandler






function ToggleDiashowImageState(imagefile)
{
    var checkbox = document.getElementsByName('imagestate[' + imagefile + ']')[0];
    
    checkbox.checked = !checkbox.checked;
    
    if(checkbox.checked == true)
    {
        document.getElementById(imagefile).style.backgroundImage = "url('sysfiles/text_bg_very_dark.png')";
    }
    else{
        document.getElementById(imagefile).style.backgroundImage = '';
    }
    
}

function ToggleFotoNewCategoryField()
{
    var wert = document.getElementById('foto_category_select').value;
    
    if(wert == 'NEW')
    {
        document.getElementById('foto_new_gallery_title').style.visibility = 'visible';
    }
    else{
        document.getElementById('foto_new_gallery_title').style.visibility = 'hidden';
    }
}