var timeout_hide=0;
var timeout_show=0;
function nav_show(obj)
{
   var nav=document.getElementById("navigator");
   nav.style.visibility="visible";
   nav.style.top =  115;//obj.style.top;
   nav.style.left = 10;//obj.style.left;
}
function nav_hide()
{
   var nav=document.getElementById("navigator");
   nav.style.visibility="hidden";
}
function nav_change_visible()
{
   var nav=document.getElementById("navigator");
   nav.style.visibility = nav.style.visibility == "visible" ? "hidden" : "visible";
}
function nav_timed_hide()
{
   timeout_hide = window.setTimeout("nav_hide()",1500);
}
function nav_break_timed_hide()
{
   window.clearTimeout(timeout_hide);
}
function nav_timed_show(obj)
{
   timeout_show = window.setTimeout("nav_show()",1500);
}
function nav_break_timed_show()
{
   window.clearTimeout(timeout_show);
}