navTimer = null;
currentNav = 0;
o_navigator = navigator.userAgent
var isIE50 = (o_navigator.indexOf("MSIE 5.0") > -1) ? 1 : 0;
var isIE52 = (o_navigator.indexOf("MSIE 5.2") > -1) ? 1 : 0;
var isNN6 = (o_navigator.indexOf("Netscape6") > -1) ? 1 : 0;
var isDOM = (document.getElementById) ? 1 : 0;

function mainNavOver(o_div){
  if(isDOM&&!isNN6&&!isIE52&&!isIE50){
    if(currentNav)currentNav.className = "";
      clearTimeout(navTimer);
      o_div.className="topNavOver";
  }
}

function mainNavOut(o_div){
  if(isDOM&&!isNN6&&!isIE52&&!isIE50){
    currentNav = o_div;
    navTimer = setTimeout('currentNav.className=""',1);
  }
}