/*
function getelementbyid(id)
* id Attribut
function getchildsbytagname(el,name)
* wie getelementsbytagname; aber nur die direkt darunterliegenden
function getelementsbytagname(el,name)
* el entweder von getelementbyid oder 0, dann werden alle elemente von document verwendet;
* bei NS4  funktioniert img und form
* ansonsten wird name ignoriert und die untergeorneten layer zurückgegeben
* layer in den untergeordneten layern werden ignoriert
function innerhtml(el,html)
* verändert den Inhalt eines elmentes
function getimages(el)
* alle Bilder unterhalb eines Elementes
* ACHTUNG: bei NS4 werden bilder in untergeordneten layern nicht erfasst
function getheight(el)
function getleft(el)
function getname(el)
* das attribut "name" des Elements
function gettop(el)
function getwidth(el)
*/
function getelementbyid(id)
{
 if(document.getElementById)
  return document.getElementById(id);
 if(document.all)
  return document.all[id];
 if(document.layers)
 {
   return getlayer(document,id);
 }
 return 0;
}
function getchildsbytagname(el,name)
{
 var erg=new Array();
 if(document.layers)
 {
  var tmp;
  if(el==0)
   tmp=document;
  else
   tmp=el.document;
  if(name.toLowerCase()=="img")
   return tmp.images;
  if(name.toLowerCase()=="form")
   return tmp.forms;
  return tmp.layers;
 }
 if(el==0)
  el=document;
 if(document.getElementsByTagName)
 {
  var i=0;
  var j=0;
  var els=el.getElementsByTagName(name);
  for(i=0;i<els.length;i++)
  {
   if(els[i].parentNode==el)
   {
    erg[j]=els[i];
    j++;
   }
  }
  return erg;
 }
 if(document.all)
 {
  var i=0;
  var j=0;
  var els=el.all.tags(name);
  for(i=0;i<els.length;i++)
  {
   if(els[i].parentElement==el)
   {
    erg[j]=els[i];
    j++;
   }
  }
  return erg;
 }
 return erg;
}
function getelementsbytagname(el,name)
{
 if(document.layers)
 {
  var tmp;
  if(el==0)
   tmp=document;
  else
   tmp=el.document;
  if(name.toLowerCase()=="img")
   return tmp.images;
  if(name.toLowerCase()=="form")
   return tmp.forms;
  return tmp.layers;
 }
 if(el==0)
  el=document;
 if(document.getElementsByTagName)
  return el.getElementsByTagName(name);
 if(document.all)
  return el.all.tags(name);
 if(name.toLowerCase()=="img")
   return document.images;
 return 0;
}
function getimages(el)
{
 return  getelementsbytagname(el,"img");
}
function getheight(el)
{
 if(el.offsetHeight)
  return el.offsetHeight;
 if(document.layers)
  return el.clip.height;
 return 0;
}
function getleft(el)
{
 if(el.offsetLeft)
  return el.offsetLeft;
 if(document.layers)
  return el.left;
 return 0;
}
function getname(el)
{
 if(document.layers)
 {
  var pos=el.name.lastIndexOf("_");
  if(pos==-1)
   return el.name;
  return el.name.substring(0,pos);
 }
 if(el.name)
  return el.name;
 if(el.getAttribute)
  return el.getAttribute("name");
 return "";
}
function getscrollheight()
{
 if(!document.layers)
 {
   if(document.body.scrollHeight)
	return document.body.scrollHeight;
 }
 return 800;
}
function gettop(el)
{
 if(el.offsetTop)
  return el.offsetTop;
 if(document.layers)
  return el.top;
 return 0;
}
function getwidth(el)
{
	var w=0;
	if(el.offsetWidth)
	{
		w=el.offsetWidth;
		return w;
	}
	if(document.layers)
		return el.clip.width;
	return w;
}
function innerhtml(el,html)
{
 if(el.innerHTML)
  el.innerHTML=html;
 if(document.layers)
 {
  el.document.clear()
  el.document.write(html);
  el.document.close();
 }
}
function isvisible(el)
{ 
 if(document.layers)
 {
  if(el.visibility=="show")
   return true
  else
   return false
 }else
 {
  if(el.style.visibility=="hidden")
   return false
  else
   return true
 }
 return false;
}
function setbgcolor(el,value)
{
   if(document.layers)
   {
     el.bgColor=value;return;
   }
   el.style.backgroundColor=value;
}
function setcolor(el,value)
{
 if(!document.layers)
    el.style.color=value;
}
function setfontweight(el,value)
{
 if(!document.layers)
    el.style.fontWeight=value;
}
function setheight(el,y)
{
 if(el.style)
  el.style.height=y+"px";
 if(document.layers)
 {
 }
}
function setleft(el,posx)
{
 if(el.style)
  el.style.left=posx+"px";
 if(document.layers)
 {
  el.moveTo(posx,el.top);
  if(el.parentLayer)
  {
   el.parentLayer.resizeBy(posx,0);
  }
 }
}
function settop(el,posy)
{
 if(el.style)
  el.style.top=posy+"px";
 if(document.layers)
 {
  el.moveTo(el.left,posy);
  if(el.parentLayer)
  {
   el.parentLayer.resizeBy(0,posy);
  }
 }
}
function setvisibility(el,v)
{
 if(el.style)
  el.style.visibility=v;
 if(document.layers)
 {
   el.visibility=v;
 }
}
function getlayer(doc,id)
{
 var i;
 var l=doc.layers[id];
 if(l)
{
  return l;
}
 for(i=0;i<doc.layers.length;i++)
 {
  l=getlayer(doc.layers[i].document,id);
  if(l)
   return l;
 }
 return 0;
}