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();
	}
	else	{
		expires = "";
	}
	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 eraseCookie( name )	{
	createCookie( name, "", 10 );
}