function toggle(item) {
 obj=document.getElementById(item);
 iobj=document.getElementById(item+'i');
 if(obj.style.display=="block"||obj.style.visibility=="visible") {
  obj.style.display="none";
  obj.style.visibility="hidden";
  iobj.src='pictures/plus.gif';
 }
 else {
  obj.style.display="block";
  obj.style.visibility="visible";
  iobj.src='pictures/minus.gif';
 }
}

function expandall() {
 divs=document.getElementsByTagName("DIV");
 for(i=0;i<divs.length;i++) {
  iobj=document.getElementById(divs[i].id+'i');
  divs[i].style.display="block";
  divs[i].style.visibility="visible";
  iobj.src='pictures/minus.gif';
 }
}

function collapseall() {
 divs=document.getElementsByTagName("DIV");
 for(i=0;i<divs.length;i++) {
  iobj=document.getElementById(divs[i].id+'i');
  divs[i].style.display="none";
  divs[i].style.visibility="hidden";
  iobj.src='pictures/plus.gif';
 }
}