function Toggle(item) {
    obj=document.getElementById(item);
    visible=(obj.style.display!="none")
    key=document.getElementById("x" + item);
    if (visible) {
        obj.style.display="none";
        key.innerHTML="<img src='images/plustree.gif' width='16' height='16' hspace='0' vspace='0' border='0'>";
    } else {
      obj.style.display="block";
      key.innerHTML="<img src='images/minustree.gif' width='16' height='16' hspace='0' vspace='0' border='0'>";
   }
}

function Expand() {
   divs=document.getElementsByTagName("DIV");
   for (i=0;i<divs.length;i++) {
     divs[i].style.display="block";
     key=document.getElementById("x" + divs[i].id);
     key.innerHTML="<img src='images/minustree.gif' width='16' height='16' hspace='0' vspace='0' border='0'>";
   }
}

function Collapse() {
    divs=document.getElementsByTagName("DIV");
    for (i=0;i<divs.length;i++) {
        divs[i].style.display="none";
        key=document.getElementById("x" + divs[i].id);
        key.innerHTML="<img src='images/plustree.gif' width='16' height='16' hspace='0' vspace='0' border='0'>";
   }
}