var head = "display:''"
var img1 = new Image()
img1.src = "fold.gif"
var img2 = new Image()
img2.src = "open.gif"

var ns6 = document.getElementById && !document.all
var ie4 = document.all && navigator.userAgent.indexOf("Opera") == -1

function checkcontained(e) {
    var iscontained = 0
    cur = ns6 ? e.target : event.srcElement
    var i = 0
    if (cur.id == "foldheader")
        iscontained = 1
    else
        while (ns6 && cur.parentNode || (ie4 && cur.parentElement)) {
        if (cur.id == "foldheader" || cur.id == "foldinglist") {
            iscontained = (cur.id == "foldheader") ? 1 : 0
            break
        }
        cur = ns6 ? cur.parentNode : cur.parentElement
    }

    if (iscontained) {
        var foldercontent = ns6 ? cur.nextSibling.nextSibling : cur.all.tags("UL")[0]
        if (foldercontent.style.display == "none") {
            foldercontent.style.display = ""
            //cur.style.listStyleImage="url(open.gif)"
        }
        else {
            foldercontent.style.display = "none"
            //cur.style.listStyleImage="url(fold.gif)"
        }
    }
}

if (ie4 || ns6)
    document.onclick = checkcontained

//-->