function createCookie ( name, value, minutes )
{
	if ( minutes )
	{
		var date = new Date();
		date.setTime ( date.getTime() + ( minutes * 60 * 60 * 1000 ) );
		var expires = "; expires=" + date.toGMTString();
	}
	else var expires = "";
	document.cookie = name + "=" + escape ( 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 unescape ( c.substring ( nameEQ.length, c.length ) );
	}
	return null;
}

function eraseCookie ( name )
{
	createCookie ( name, "", -1 );
}