var timeout = 300; var closetimer = 0; var ddmenuitem = 0; 
  function mopen(id) 
	{ mcancelclosetime();
 	if(ddmenuitem) ddmenuitem.style.visibility = 'hidden';
	 ddmenuitem = document.getElementById(id); 
	ddmenuitem.style.visibility = 'visible'; }
function mclose() 
	{ if(ddmenuitem) ddmenuitem.style.visibility = 'hidden'; } 
 function mclosetime() 
	{ closetimer = window.setTimeout(mclose, timeout); } 
function mcancelclosetime() 
	{ if(closetimer) 
		{ window.clearTimeout(closetimer); closetimer = null; } 
	}
 document.onclick = mclose;