var openImg = new Image();
openImg.src = "icons/arrowdown.gif";

var closedImg = new Image();
closedImg.src = "icons/arrowup.gif";
   
function showBranch(branch, branch2) {
  var objBranch = document.getElementById(branch).style;
  var objBranch2 = document.getElementById(branch2).style;
  
  if(objBranch.display=="inline"){
	 objBranch.display="none";
	 objBranch2.display="inline";
  }else{
	 objBranch.display="inline";
	 objBranch2.display="none";
  }
}

function swapFolder(img) {
  objImg = document.getElementById(img);
  if(objImg.src.indexOf('arrowup.gif')>-1)
	 objImg.src = openImg.src;
  else
	 objImg.src = closedImg.src;
}