function void_click() {
return false
}

function ukaz_menu(elid,elnum) {
  var elid_block="";
  for (a=0;a<elnum;a++) {
    elid_block=elid+a;
    el=document.getElementById(elid_block).style; 
    if (el.display=="block") {el.display="none";}
    else {el.display="block";}
  }
}