var timeout    = 500;
var closetimer = 0;
var ddmenuitem = 0;


function MenuDeroulant_open(par, enf)
{ 
   MenuDeroulant_canceltimer();
   MenuDeroulant_close(par, enf);
   ddmenuitem = par.find(enf).css('visibility', 'visible');
}


function MenuDeroulant_close(par, enf)
{
	ddmenuitem = par.find(enf)
	if(ddmenuitem) ddmenuitem.css('visibility', 'hidden');
}


function MenuDeroulant_timer(par, enf)
{  
	closetimer = window.setTimeout(MenuDeroulant_close(par, enf), timeout);
}


function MenuDeroulant_canceltimer()
{  
	if(closetimer)
    {  
		window.clearTimeout(closetimer);
		closetimer = null;
    }
}