var ie4=document.all&&navigator.userAgent.indexOf("Opera")==-1
var ns6=document.getElementById&&!document.all
var ns4=document.layers

function showmenu(e,which)
{
    if (!document.all&&!document.getElementById&&!document.layers) return
    clearhidemenu()
    menuobj=ie4? document.all.popmenu : ns6? document.getElementById("popmenu") : ns4? document.popmenu : ""
    menuobj.thestyle=(ie4||ns6)? menuobj.style : menuobj
    if (ie4||ns6)
        menuobj.innerHTML=which
    else
    {
        menuobj.document.write('<layer name=gui bgColor=#E6E6E6 width=165 onmouseover="clearhidemenu()" onmouseout="hidemenu()">'+which+'</layer>')
        menuobj.document.close()
    }
    menuobj.contentwidth=(ie4||ns6)? menuobj.offsetWidth : menuobj.document.gui.document.width
    menuobj.contentheight=(ie4||ns6)? menuobj.offsetHeight : menuobj.document.gui.document.height
    eventX=ie4? event.clientX : ns6? e.clientX : e.x
    eventY=ie4? event.clientY : ns6? e.clientY : e.y
    
    var rightedge=ie4? document.body.clientWidth-eventX : window.innerWidth-eventX
    var bottomedge=ie4? document.body.clientHeight-eventY : window.innerHeight-eventY
    
    if (rightedge<menuobj.contentwidth)
        menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX-menuobj.contentwidth : ns6? window.pageXOffset+eventX-menuobj.contentwidth : eventX-menuobj.contentwidth
    else
        menuobj.thestyle.left=ie4? document.body.scrollLeft+eventX : ns6? window.pageXOffset+eventX : eventX
        
    if (bottomedge<menuobj.contentheight)
        menuobj.thestyle.top=ie4? document.body.scrollTop+eventY-menuobj.contentheight : ns6? window.pageYOffset+eventY-menuobj.contentheight : eventY-menuobj.contentheight
    else
        menuobj.thestyle.top=ie4? document.body.scrollTop+event.clientY : ns6? window.pageYOffset+eventY : eventY
        
    menuobj.thestyle.visibility="visible"
    
    return false
}
function contains_ns6(a, b)
{
    while (b.parentNode)
        if ((b = b.parentNode) == a)
            return true;
    return false;
}
function hidemenu()
{
    if (window.menuobj)
        menuobj.thestyle.visibility=(ie4||ns6)? "hidden" : "hide"
}
function dynamichide(e)
{
    if (ie4&&!menuobj.contains(e.toElement))
        hidemenu()
    else if (ns6&&e.currentTarget!= e.relatedTarget&& !contains_ns6(e.currentTarget, e.relatedTarget))
        hidemenu()
}
function delayhidemenu()
{
    if (ie4||ns6||ns4)
        delayhide=setTimeout("hidemenu()",300)
}
function clearhidemenu()
{
    if (window.delayhide)
        clearTimeout(delayhide)
}
function highlightmenu(e,state)
{
    if (document.all)
        source_el=event.srcElement
    else if (document.getElementById)
        source_el=e.target
    if (source_el.className=="menuitems")
    {
        source_el.id=(state=="on")? "mouseoverstyle" : ""
    }
    else
    {
        while(source_el.id!="popmenu")
        {
            source_el=document.getElementById? source_el.parentNode : source_el.parentElement
            if (source_el.className=="menuitems")
            {
                source_el.id=(state=="on")? "mouseoverstyle" : ""
            }
        }
    }
}

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