var imgs=new Array();
   var img_tags=document.getElementsByTagName("img");

    imgs["main"]=new Image();
    imgs["main"].src="/img/main.gif";
    imgs["about"]=new Image();
    imgs["about"].src="/img/about.gif";
    imgs["offers"]=new Image();
    imgs["offers"].src="/img/offers.gif";
    imgs["prices"]=new Image();
    imgs["prices"].src="/img/prices.gif";
    imgs["forum"]=new Image();
    imgs["forum"].src="/img/forum.gif";
    imgs["contacts"]=new Image();
    imgs["contacts"].src="/img/contacts.gif";
    imgs["friends"]=new Image();
    imgs["friends"].src="/img/friends.gif";

    imgs["main_sel"]=new Image();
    imgs["main_sel"].src="/img/main_sel.gif";
    imgs["about_sel"]=new Image();
    imgs["about_sel"].src="/img/about_sel.gif";
    imgs["offers_sel"]=new Image();
    imgs["offers_sel"].src="/img/offers_sel.gif";
    imgs["prices_sel"]=new Image();
    imgs["prices_sel"].src="/img/prices_sel.gif";
    imgs["forum_sel"]=new Image();
    imgs["forum_sel"].src="/img/forum_sel.gif";
    imgs["contacts_sel"]=new Image();
    imgs["contacts_sel"].src="/img/contacts_sel.gif";
    imgs["friends_sel"]=new Image();
    imgs["friends_sel"].src="/img/friends_sel.gif";

    function preload_navigation_bar()
     {
      img_tags["main"].src=imgs["main"].src;
      img_tags["about"].src=imgs["about"].src;
      img_tags["offers"].src=imgs["offers"].src;
      img_tags["prices"].src=imgs["prices"].src;
      img_tags["forum"].src=imgs["forum"].src;
      img_tags["contacts"].src=imgs["contacts"].src;
      img_tags["friends"].src=imgs["friends"].src;
     }

    function get_selected(pict_name)
     {
      img_tags[pict_name].src=imgs[pict_name+"_sel"].src;
     }

    function get_back(pict_name)
     {
      img_tags[pict_name].src=imgs[pict_name].src;
     }