cm         = null;
hide_delay = 500;
tstat      = 0;
timer1     = null;

isNS4 = (document.layers) ? true : false;
isIE4 = (document.all  && !document.getElementById) ? true : false;
isIE5 = (document.all  && document.getElementById)  ? true : false;
isNS6 = (!document.all && document.getElementById)  ? true : false;

function switchDiv(objElement, bolVisible) {
    if (isNS4 || isIE4){
        if (!bolVisible) {
            objElement.visibility ="hidden"
        } else {
            objElement.visibility ="visible"
        }
    } else if (isIE5 || isNS6) {
        if (!bolVisible) {
            objElement.style.display = "none";
        } else {
            objElement.style.display = "";
        }
    }
    return 1;
}

function getPos(el, sProp) {
    var iPos = 0;
    while (el != null) {
        iPos += el["offset" + sProp];
        el = el.offsetParent;
    }
    return iPos;
}

function getelementbyid(myid) {
    if (isNS4){
        objElement = document.layers[myid];
    } else if (isIE4) {
        objElement = document.all[myid];
    } else if (isIE5 || isNS6) {
        objElement = document.getElementById(myid);
    }
    return objElement;
}

function show(el, m) {
    if (cm != null) {
        switchDiv(cm, false);
    }

    if (m != null) {
        m = getelementbyid(m);
        m.style.left = getPos(el, "Left") + "px";
        m.style.top  = getPos(el, "Top") + el.offsetHeight + "px";
        switchDiv(m, true);
        cm = m;
    }
}

function hidemenu() {
    if (tstat == 0) {
	    timer1 = setTimeout("show(null, null)", hide_delay);
	    tstat  = 1;
    }
    return 1;
}

function cancelhide() {
    if (tstat == 1) {
        clearTimeout(timer1);
        tstat=0;
    }
    return 1;
}