//
// JavaScript library for handling cookies.
// I used the example code provided by Scott Andrew at http://www.quirksmode.org/js/cookies.html
//


//
// Creates/Writes a cookie.
//
function createCookie( 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=/";
}



//
// Reads a cookie and returns its value.   If no cookie was found, the function
// will return whatever value you specify via the 'default_value' parameter.
//
function readCookie(name, default_value)
{
	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 default_value;
}



//
// Deletes a cookie from the users system.
//
function eraseCookie(name)
{
	createCookie(name,"",-1);
}