var MINUTE = 60*1000;
var HOUR   = MINUTE*60;
var DAY    = HOUR*24;
var WEEK   = DAY*7;
var MONTH  = DAY*30;
var YEAR   = DAY*365;

function set_cookie(name,value,expire)
{
	if (expire)
	{
		var date = new Date();
		date.setTime(date.getTime()+(expire));
		var expires = "; expires="+date.toGMTString();
	}
	else var expires = "";
	document.cookie = name+"="+value+expires+"; path=/";
}

function get_cookie(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 unset_cookie(name)
{
	set_cookie(name,"",-1);
}