function openDropDown(id){
  element = document.getElementById(id);
  x = getX(element);
  x = x - 7;
  ul = document.getElementById(id + '_list'); 
  ul.style.left = x + "px";
  //slidedown(id + '_list');
  //ul.style.display = "";
}

function closeDropDown(id){
  ul = document.getElementById(id + "_list");
  //slideup(id + '_list');
  //ul.style.display = "none";
} 

function triggerDropDown(id){
  ul = document.getElementById(id + "_list");
  if(ul.style.display == "none"){
    ul.style.display == "";
  }
  else{
    ul.style.display == "none";
  }
}

function getX( oElement ){
var iReturnValue = 0;
while( oElement != null ) {
iReturnValue += oElement.offsetLeft;
oElement = oElement.offsetParent;
}
return iReturnValue;
}

var timerlen = 20;
var slideAniLen = 250;

var timerID = new Array();
var startTime = new Array();
var obj = new Array();
var endHeight = new Array();
var moving = new Array();
var dir = new Array();

function slidedown(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display != "none")
                return; // cannot slide down something that is already visible

        moving[objname] = true;
        dir[objname] = "down";
        startslide(objname);
}

function slideup(objname){
        if(moving[objname])
                return;

        if(document.getElementById(objname).style.display == "none")
                return; // cannot slide up something that is already hidden

        moving[objname] = true;
        dir[objname] = "up";
        startslide(objname);
}

function startslide(objname){
        obj[objname] = document.getElementById(objname);

        endHeight[objname] = parseInt(obj[objname].style.height);
        startTime[objname] = (new Date()).getTime();

        if(dir[objname] == "down"){
                obj[objname].style.height = "1px";
        }

        obj[objname].style.display = "block";

        timerID[objname] = setInterval('slidetick(\'' + objname + '\');',timerlen);
}

function slidetick(objname){
        var elapsed = (new Date()).getTime() - startTime[objname];

        if (elapsed > slideAniLen)
                endSlide(objname)
        else {
                var d =Math.round(elapsed / slideAniLen * endHeight[objname]);
                if(dir[objname] == "up")
                        d = endHeight[objname] - d;

                obj[objname].style.height = d + "px";
        }

        return;
}

function endSlide(objname){
        clearInterval(timerID[objname]);

        if(dir[objname] == "up")
                obj[objname].style.display = "none";

        obj[objname].style.height = endHeight[objname] + "px";

        delete(moving[objname]);
        delete(timerID[objname]);
        delete(startTime[objname]);
        delete(endHeight[objname]);
        delete(obj[objname]);
        delete(dir[objname]);

        return;
}

function setInfo(input){
    position = -1;
    for (var i = 0; i < seminare.length; i++){
      if(seminare[i] == input){
         position = i;
      }     
    }
    if(position == -1){
      document.getElementById('seminar_datum').value = "---";
      document.getElementById('seminar_preis').value = "---";
    }
    else{
      document.getElementById('seminar_datum').value = datum[position];
      document.getElementById('seminar_preis').value = preis[position];
    }
}
    
    
    var visibleSeminare;
function loadDropDown(seminare){
      dropdown = document.getElementById('seminar');
      for (var i = 1; i < seminare.length + 1; i++){
        NeuerEintrag = new Option(seminare[i - 1], seminare[i - 1], false, true);
        dropdown.options[i] = NeuerEintrag;
      }
      dropdown.options[0].selected = true;      
}
    
function setSendButton(){
      isChecked = document.getElementById('agb').checked
      if(isChecked == true){
        document.getElementById('send').disabled = '';  
      }
      else{
        document.getElementById('send').disabled = 'disabled';
      }
}

/* Well, just a try */ 

var DDSPEED = 10;
var DDTIMER = 15;

// main function to handle the mouse events //
function ddMenu(id,d){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  var status = document.getElementById('status-one');

  clearInterval(c.timer);
  if(d == 1){
    status.value = 1;
 
    clearTimeout(h.timer);
    if(c.maxh && c.maxh <= c.offsetHeight){return}
    else if(!c.maxh){
      c.style.display = 'block';
      c.style.height = 'auto';
      c.maxh = c.offsetHeight;
      //c.style.height = '0px';
    }
    c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
  }else {
    if(id == 'one'){
      status.value = 0;
    }
    else if(id == 'two'){
      if(status.value == 1){
         ddMenu('one',-1);
      }
    }     
    h.timer = setTimeout(function(){ddCollapse(c)},50);
  }
}

// Mach mal Pause, trink ne Brause...
function pausecomp(millis){
  var date = new Date();
  var curDate = null;

  do { curDate = new Date(); }
  while(curDate-date < millis);
} 

// collapse the menu //
function ddCollapse(c){ 
  c.timer = setInterval(function(){ddSlide(c,-1)},DDTIMER);   //div schließen
}

// cancel the collapse if a user rolls over the dropdown //
function cancelHide(id){
  var h = document.getElementById(id + '-ddheader');
  var c = document.getElementById(id + '-ddcontent');
  var status = document.getElementById('status-one');
  if(id == 'one'){
    status.value = 1;
  }
    clearTimeout(h.timer);
    clearInterval(c.timer);
    if(c.offsetHeight < c.maxh){
      c.timer = setInterval(function(){ddSlide(c,1)},DDTIMER);
    }

}

// incrementally expand/contract the dropdown and change the opacity //
function ddSlide(c,d){
  var currh = c.offsetHeight;
  var dist;
  if(d == 1){
    dist = (Math.round((c.maxh - currh) / DDSPEED));
  }else{
    dist = (Math.round(currh / DDSPEED));
  }
  if(dist <= 1 && d == 1){
    dist = 1;
  }
  if(dist == 0 && d == -1){
    currh = 0;
    
  }
  c.style.height = currh + (dist * d) + 'px';
  c.style.opacity = currh / c.maxh;
  c.style.filter = 'alpha(opacity=' + (currh * 100 / c.maxh) + ')';
  if((currh < 2 && d != 1) || (currh > (c.maxh - 2) && d == 1)){
    clearInterval(c.timer);
  }
}