function showBranch(branch){
        var objBranch = document.getElementById(branch).style;
        if(objBranch.display=="block")
                objBranch.display="none";
        else
                objBranch.display="block";
}
function swapFolderSign(sFolderName){
        objPlusSign = document.getElementById(sFolderName+"Plus");
        
        if(objPlusSign.style.display=="none")
                objPlusSign.style.display="inline"
        else
                objPlusSign.style.display="none"
        
        objMinusSign = document.getElementById(sFolderName+"Minus");
        if(objMinusSign.style.display=="inline")
                objMinusSign.style.display="none"
        else
                objMinusSign.style.display="inline"
}