var expires="Mon, 02-Feb-38 00:00:01 GMT";

function readCookie(name)
{
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++)
    {
      var c = ca[i];
      while (c.charAt(0)==' ') c = c.substring(1,c.length);
      if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
  return null;
}


function changebg(color) {
  document.getElementById("greyiscool").style.backgroundColor = color;
  
  var cookie = "bgcolor"+"="+color+"; expires="+expires;
  document.cookie = cookie;
  //      alert(document.cookie);
}

function imageSize(size) {
  var cookie = "imagesize"+"="+size+"; expires="+expires;
  document.cookie = cookie;
  var oFilename = document.images.mainimage.src;
  var filename=oFilename.substring(oFilename.lastIndexOf("/"), oFilename.length);
  document.images.mainimage.src="../"+size+"images"+filename;
  //alert(document.cookie);
}


function openprefs() {
  var popthis = document.getElementById('preferences');
  popthis.style.display='block';
}

function closeprefs() {
  var popthis = document.getElementById('preferences');
  popthis.style.display='none';
}