var now = new Date();
var mnCookieLife = new Date(now.getTime() + 1000 * 60 * 60 * 24 * 150);

function mnToggle(option) {
    var node = document.getElementById("mn-node" + option).style;
    var joint = document.getElementById("mn-joint" + option);
    var icon = document.getElementById("mn-icon" + option);
    var mnClosedNodes = new Array();

    if (node.display == "block") {
        node.display = "none";
        joint.src = mnImagedir + (joint.src.substring(joint.src.length - 10) == "bottom.gif" ? "plusbottom.gif" : "plus.gif");
        icon.src = mnImagedir + "option.gif";
        mnNodes[option] = 'closed';
    } else {
        node.display = "block";
        joint.src = mnImagedir + (joint.src.substring(joint.src.length - 10) == "bottom.gif" ? "minusbottom.gif" : "minus.gif");
        icon.src = mnImagedir + "optionopen.gif";
        mnNodes[option] = 'open';
    }
    for (var i=0; i<mnNodes.length; i++) {
        if (mnNodes[i] == 'closed') {
            mnClosedNodes.push(i);
        }
    }
    document.cookie = mnCookie + '=' + mnClosedNodes.join(".") + '; expires=' + mnCookieLife.toGMTString() + '; path=/';
}