function ShowHide(id)
{
  var itm = null;
  
img01=new Image()
img01.src="inc/pics/plus.gif"
img02=new Image()
img02.src="inc/pics/minus.gif"

bild = [id] + ["PlusMinus"];



  if (document.getElementById) {
	itm = document.getElementById(id);
  } else if (document.all){
	itm = document.all[id];
  } else if (document.layers){
	itm = document.layers[id];
  }

  if (!itm) {
   // do nothing
  }
  else if (itm.style) {

	if (itm.style.display == "none") {
	  itm.style.display = "";
    document.images[bild].src=img02.src;



	}
	else {
	  itm.style.display = "none";
  	document.images[bild].src=img01.src;



	}
  }
  else {
	itm.visibility = "show";

	 
  }
}