var shown=new Array();
var showncount=0;
function show(i)
{
    eval('timeout'+i+'=0');
    document.getElementById("n"+i).style.visibility="visible"
    shown[showncount]=i;
    showncount++;
}
function wait(i)
{
    setTimeout("hide("+i+");", 500);
    eval('timeout'+i+'=1');
}
function hide(i)
{
    eval('var tst=timeout'+i);
    if (tst){
        document.getElementById("n"+i).style.visibility="hidden"
    }
}
function hide_immediatly(i)
{
    document.getElementById("n"+i).style.visibility="hidden"
}
function hideall()
{
    for (n=showncount-1;n>-1;n--){
        hide_immediatly(shown[n]);
    }
    showncount=0;
}