function reveal(id,show)
{ if (show)
    document.getElementById(id).style.visibility='visible';
  else
    document.getElementById(id).style.visibility='hidden';
}

function postit(form,flag)
{ switch (flag)
  { case 1: form.action="utils/amcmailer.php"; break;
    case 2:
    case 3:
      { n=new Number(form.on_month.value);
        if (flag==2)
        { n--;
          if (n<0)
            n=13;
        }
        else if (flag==3)
        { n++;
          if (n>13)
            n=0;
        }

        form.action="calendar2022.php?month="+n;
        break;
      }
    default: return;
  }

  form.method="post"

  if (flag==1)
  { reveal('sendbutton',false);
    reveal('ack',true);
  }

  form.submit();
}

function nfour(number)
{ return (number < 1000) ? number + 1900 : number;}

function calcdate()
{ var now = new Date();
  var days = new Array('Sunday','Monday','Tuesday','Wednesday',
    'Thursday','Friday','Saturday');
  var months = new Array('January','February','March','April','May','June',
    'July','August','September','October','November','December');
  var date = ((now.getDate()<10) ? "0" : "")+ now.getDate();
  today =  days[now.getDay()]+" "+now.getDate()+" "+months[now.getMonth()]
    + " " +nfour(now.getYear());
  return today;
}

function launch(form,pg)
{ form.method="get";
  form.action=pg;
  form.submit();
}

function getarticle(form)
{ var i=form.articles.selectedIndex;
  rn=recarray[i];
  form.action="diary.php?rn="+rn;
  form.submit();
}

function getworldnews(form)
{ var i=form.articles.selectedIndex;
  rn=recarray[i];
  form.action="worldnews.php?rn="+rn;
  form.submit();
}

function findpos(object)
{ var x=y=0;
  if (object.offsetParent)
    do
    { x+=object.offsetLeft;
      y+=object.offsetTop;
    } while (object=object.offsetParent);
  return [x,y];
}

function windowsize()
{ var winW=630,winH=460;

  if (document.body && document.body.clientWidth)
  { winW = document.body.clientWidth;
    winH = document.body.clientHeight;
  }

  if (document.compatMode=='CSS1Compat' &&
    document.documentElement &&
    document.documentElement.clientWidth )
  { winW = document.documentElement.clientWidth;
    winH = document.documentElement.clientHeight;
  }

  if (window.innerWidth && window.innerHeight)
  { winW = window.innerWidth;
    winH = window.innerHeight;
  }

  return [winW,winH];
}

function hidepic(n)
{ document.getElementById(n).style.visibility='hidden';
}

function showpic(n)
{ var ob,obpic;

  ob=document.getElementById(n);
  obpic=document.getElementById(n+'pic');

  if (ob.style.visibility=='visible')
  { ob.style.visibility='hidden';
    return;
  }

  ws=windowsize();
  stb=document.body.scrollTop;

  var x=(805-obpic.width)/2+50;
  var y=stb+(ws[1]-obpic.height)/2;

  ob.style.left=x+'px';
  ob.style.top=y+'px';
  ob.style.visibility='visible';
  ob.style.zIndex=2000000;
}