simple show/hide menu (without the need for a js framework)

simple-menu.js

/* for showing the collection of feeds menu*/
var az=500;var bz=0;var cz=0;function o(ez){fz();if(cz)cz.style.visibility='hidden';cz=document.getElementById(ez);cz.style.visibility='visible';cz.onmouseout=gz;cz.onmouseover=fz;}
function hz(){if(cz)cz.style.visibility='hidden';}
function gz(){bz=window.setTimeout(hz,az);}
function fz(){if(bz){window.clearTimeout(bz);bz=null;}
}
document.onclick=hz;