function on_off (id)
{
    if (document.getElementById (id+"_content").style.display=="none")
    {
        document.getElementById (id+"_header").innerHTML=
            document.getElementById (id+"_header").innerHTML.replace (/show.gif/,"hide.gif");
        document.getElementById (id+"_content").style.display="block";
    }
    else
    {
        document.getElementById (id+"_header").innerHTML=
            document.getElementById (id+"_header").innerHTML.replace (/hide.gif/,"show.gif");
        document.getElementById (id+"_content").style.display="none";
    }
}
function submit_form()
{
    var i, j=0;
    var el=document.forms["f"];
    for (i=0; i<el.length; i++)
    {
        if (el[i].name=="subotr")
            el[i].name="subotr[]";
        if (el[i].name=="region")
            el[i].name="region[]";
    }
    document.getElementById("month_id1").value=
        document.getElementById("month1").selectedIndex+1;
    document.getElementById("month_id2").value=
        document.getElementById("month2").selectedIndex+1;
    document.f.submit();
}