$(document).ready(nowcall);
var he, pa, is, ni, dn;
function nowcall()
{
  he= document.getElementById('header');
  pa= document.getElementById('page');
  is= document.getElementById('isle');
  ni= document.getElementById('night');
  var now = new Date();
  var hour = now.getHours();
  if(hour>=22 || hour<6 ) // С 22х до 6 утра ночь
  {
    dn=1;
    bnight();
  } else {
    dn=0;
    bday();
  }
}
function callday()
{
  if(1==dn)
  {
    bday();
    dn=0;
    return;
  }
  dn=1;
  bnight();
}
function bnight()
{
  he.className='header_n';
  pa.className='page_n';
  is.src='skins/boststroy/img/theme/footer_isle_n.jpg';
  ni.src='skins/boststroy/img/theme/moon.png';
}
function bday()
{
  he.className='header';
  pa.className='page';
  is.src='skins/boststroy/img/theme/footer_isle.jpg';
  ni.src='skins/boststroy/img/theme/sun.png';
}