function showBranch(branch){
var objBranch = document.getElementById(branch).style;
if(objBranch.display!="none")
objBranch.display="none";
else
objBranch.display="block";
}
function swapFolder(img, toggle_plus, toggle_minus){
objImg = document.getElementById(img);
if(objImg){
indexPlus = objImg.src.indexOf(toggle_plus);
if(indexPlus > -1){
srcBase = objImg.src.substring(0,indexPlus);
objImg.src = srcBase + toggle_minus;
}
else{
indexMinus = objImg.src.indexOf(toggle_minus);
srcBase = objImg.src.substring(0,indexMinus);
objImg.src = srcBase + toggle_plus;
}
}
}