function setCookie( name, value, days ) {
	if ( days ) {
		var date = new Date();
		date.setTime( date.getTime() + ( days * 24 * 60 * 60 * 1000 ) );
		var expires = "; expires=" + date.toGMTString();
	}
	else
		var expires = "";
	document.cookie = name + "=" + value + expires + "; path=/";
	// alert('name='+name+', val='+value+', days='+days);
}

function getCookie( 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 deleteCookie( name ) {
	setCookie( name, "", -1 );
}