function setCookie( name , value , hours )
{
	if ( hours )
	{
		var date = new Date();
		date.setTime( date.getTime() + ( hours * 60 * 60 * 1000 ) );
		var expires = "; expires="+date.toGMTString();
	}
	else
	{
		var expires = "";
	}
	document.cookie = name + "=" + value + expires + "; path=/";
}

function getCookie( name )
{
	var nameEQ = name + "=";
	var ca = document.cookie.split(';');
	var i;
	var c;
	for( i = 0; i < ca.length; i++ )
	{
		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 eraseCookie( name )
{
	createCookie( name , "", -1 );
}