// JavaScript Document
function toggleLeafs(strDivName, strImgName, strExpandImgSource, strCollapseImgSource) {
    //Unfold the branch if it isn't visible
    if (eval (document.getElementById(strDivName)).style.display == 'none')
    {
        expand(strImgName, strExpandImgSource, strDivName);
    }
    else //Collapse the branch if it IS visible
    {
        collapse(strImgName, strCollapseImgSource, strDivName);
    }
}

function collapse(strImgName, strImgSource, strDivName)
{
    //Collapse the branch
    eval (document.getElementById(strDivName)).style.display = 'none';

    //Change the image
    document.images[strImgName].src = strImgSource
}


function expand(strImgName, strImgSource, strDivName)
{
    //Expand the branch
    eval(document.getElementById(strDivName)).style.display = 'block';

    //Change the image
    document.images[strImgName].src = strImgSource;

}