function open_window( url, width, height)
{
        var center_left = (screen.width)/2 - width/2;
        var center_top =(screen.height)/2 - height/2;
        var attributes = 'toolbar=0,location=0,left=' + center_left + ',top=' + center_top + ',directories=0,status=0,menubar=0,scrollbars=NO,scrolling=NO,resizable=NO,noresize,width=' + width + ',height=' + height;

        var winvar = window.open("myWin","TOP",attributes);
        winvar.location = url; 
        winvar.focus();   
}  

function get_image( image_id )
{  
        switch( image_id )
        {                              
        case 1: return "images/play.jpg"; 
        case 2: return "images/roks.jpg";
        case 3: return "images/windbow.jpg";
        case 4: return "images/archie.jpg";
        case 5: return "images/rolly.jpg";
        case 6: return "images/deltas.jpg";
        case 7: return "images/albert.jpg";
        case 8: return "images/gecko-twins.jpg";
        case 9: return "images/gertie.jpg";
        } 
} 

function setCookie( name, value, expires, path, domain, secure ) 
{
  var curCookie = name + "=" + escape(value) +
      ((expires) ? "; expires=" + expires.toGMTString() : "") +
      ((path) ? "; path=" + path : "") +
      ((domain) ? "; domain=" + domain : "") +
      ((secure) ? "; secure" : "");
  document.cookie = curCookie;
}

function getCookie( name ) 
{
  var dc = document.cookie;
  var prefix = name + "=";
  var begin = dc.indexOf("; " + prefix);
  if (begin == -1) {
    begin = dc.indexOf(prefix);
    if (begin != 0) return null;
  } else
    begin += 2;
  var end = document.cookie.indexOf(";", begin);
  if (end == -1)
    end = dc.length;
  return unescape(dc.substring(begin + prefix.length, end));
}

function fixDate(date) 
{
  var base = new Date(0);
  var skew = base.getTime();
  if (skew > 0)
    date.setTime(date.getTime() - skew);
}