function createCookie( name, value, days )
  {
    var expires = "";

    if ( days )
      {
        var date = new Date();
        date.setTime( date.getTime() + ( days * 24*60*60*1000 ) );
        expires = "; expires=" + date.toGMTString();
      }

    document.cookie = name + "=" + value + expires + "; path=/";
  }

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 setmag( mag )
  {
    document.getElementsByTagName( "body" )[0].className = "mag" + mag;
  }

function gomag( mag )
  {
    setmag( mag );
    createCookie( "fontMag", mag, 180 );
  }

function loadmag()
  {
    setmag( readCookie( "fontMag" ) );
  }