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/plus.gif' width='11' height='11' border='0' alt='expand decade' />";
   } else {
	 obj.style.display="block";
     key.innerHTML="<img src='images/minus.gif' width='11' height='11' border='0' alt='collapse decade' />";
   }
}

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);
     var years=divs[i].id
     key.innerHTML="<img src='images/minus.gif' width='11' height='11' border='0' alt='collapse decade' />";
   }
}

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);
     var years=divs[i].id
     key.innerHTML="<img src='images/plus.gif' width='11' height='11' border='0' alt='expand decade' />";
   }
}