var IMG_OPENED = "../images/help/tree/treenodeminus.gif"
var IMG_CLOSED = "../images/help/tree/treenodeplus.gif"
var IMG_SINGLE = "../images/help/tree/treenodedot.gif"

var CSS_EXPANDED = "helpexpanded"
var CSS_COLLAPSED = "helpcollapsed"

function help(s){
    window.open(s,'help','location=no,scrollbars=yes,resizable=yes,status=yes,width=600,height=400',true)
}

function clickHelpNode(node){
    var mNode = document.getElementById('d'+node);
    var mImg = document.getElementById('img'+node);
    
    if (mNode != null)
    {
        if (isExpanded(mNode))
        {
            mNode.className = CSS_COLLAPSED;
            if (mImg!=null)
                mImg.src = IMG_CLOSED;            
        }
        else
        {
            mNode.className = CSS_EXPANDED;
            if (mImg!=null)
                mImg.src = IMG_OPENED;
        }
    }
    
}

function isExpanded(node){
    return node.className==CSS_EXPANDED?true:false;
}