var isDOM=(document.getElementsByTagName ? true : false);

var isNS6=(navigator.vendor == ("Netscape6") || navigator.product == ("Gecko") ? true : false);

var isNS4=(document.layers ? true : false);

var isIE4=(!isDOM && document.all ? true : false);

var isNS=(isNS4 || isNS6);

var DHTML=(document.getElementById || document.all || document.layers);

function getObj(name){if(document.getElementById){return document.getElementById(name).style;}else if(document.all && !document.getElementById){return document.all[name].style;}else{return document.layers[name];}}

function unblur(){this.blur();}

function getLinksToBlur(){if(isDOM){links=document.getElementsByTagName("a");for(i=0; i<links.length; i++){links[i].onfocus=unblur;}}else{return;}}

var mo=null;

var menuActive=0;

var m=null;

function show(layerName){if(mo && mo != null){clearTimeout(m);getObj(mo).visibility='hidden';}getObj(layerName).visibility='visible';mo=layerName;}

function hide(layerName){if(menuActive == 0){getObj(layerName).visibility='hidden';}clearTimeout(m);}

function navTimer(){m=setTimeout("btnOut()",1000);}

function btnOut(){if(menuActive == 0){hide(mo);}}

function itemOver(){clearTimeout(m);menuActive=1;}

function itemOut(){menuActive=0;m=setTimeout("hide('" +mo+ "')", 400);}