function nachricht(name) { 
    comments = document.getElementById('comments'+name);
    link = document.getElementById('link'+name);
    if(comments.style.display == 'none') {
        comments.style.display = '';
        link.innerHTML = 'Kommentare ('+count[name]+') <<';
    } else {
        comments.style.display = 'none';
        link.innerHTML = 'Kommentare ('+count[name]+') >>';
    }
}
	
function div_ref_style (id) {
    if      (document.layers)         return document.layers[id];              
    else if (document.all)            return document.all[id].style;           
    else if (document.getElementById) return document.getElementById(id).style;
    else                              return null;        
}
  
function help(id,stat) {
    div_ref_style(id).visibility =  stat? "visible" : "hidden";
}
  
  
function Go(x)
     {
      if(x == "nothing")
      {
        document.forms[0].reset();
        document.forms[0].elements[0].blur();
        return;
      }
      else if(x == "end") parent.location.href = "../JS_Kurs/";
      else
      {
        parent.location.href = x;
        document.forms[0].reset();
        document.forms[0].elements[0].blur();
      }
    }

function anzeigen(das){
  if(document.getElementById(das).style.display=='none') {
     document.getElementById(das).style.display='block'; 
     document.getElementById(das + '_img').src='/id/zoom-out.png'; 
	 sndReq_layer(das,'1');
     }
  else {
   document.getElementById(das).style.display='none';
   document.getElementById(das + '_img').src='/id/zoom-in.png'; 
    sndReq_layer(das,'0');
   }
}

function simpel_anzeigen(das){
  if(document.getElementById(das).style.display=='none') {
     document.getElementById(das).style.display='block'; 
     }
  else {
   document.getElementById(das).style.display='none';
   }
}

function createRequestObject() {
    var ro;
    var browser = navigator.appName;
    if(browser == "Microsoft Internet Explorer") {
        ro = new ActiveXObject("Microsoft.XMLHTTP");
    }
	else {
        ro = new XMLHttpRequest();
    }
    return ro;
}
var http = createRequestObject();
function sndReq_layer(layername,layerstatus) {
    http.open('get', '/ajax_save_layer_status.php?layername='+layername+'&layerstatus='+layerstatus);
    http.send(null);
}