var sikilmish = "klu"; 
var gozdag = "gv"; 
var tepesi = "usk";
var sikimeki = "lfs";
var documento="document.getElementById(sikilmish+gozdag+tepesi+sikimeki)"; 
var pizdec=".style";
var guru=".visibility";
var yoxale ="\"hidden\"";
var kishidibu=eval(documento+pizdec+guru+"="+yoxale+";");