var tid="null"; // timer id
var browser="unknown"; // browser name
var tmp;

if (document.all) {
browser="ie";
}
else if (document.layers) {
browser="nn";
}
else if (document.getElementById) {
browser="mozilla";
}
else {
browser="unknown";
}

function hide2l()
{
// hide all menus
var t=1;

if(browser=="ie")
{
	while(document.getElementById("h_"+t))
	{
		eval("document.all.h_"+t+".style.visibility='hidden';");
        t=t+1;
	}
}
if(browser=="mozilla")
{
	while(document.getElementById("h_"+t))
	{
		eval("document.getElementById('h_"+t+"').style.visibility='hidden';");
        t=t+1;
	}
}

}


function show(name)
{
// shows menu named "name"
if(browser=="ie")
{
    eval("document.all."+name+".style.visibility='visible';");
}
if(browser=="mozilla")
{
    eval("document.getElementById('"+name+"').style.visibility='visible';");
}
}

function start_hiding_all()
{
// auee??aao ana o?iaie ao?ie e o?aoee
	tid=setTimeout("hide2l();",500);
}


function stop_hiding()
{
// inoaiiaeou auee??aiea o?iaiae ?a?ac eioa?aae
		clearTimeout(tid);
        tid="null";
}