// Based on functions from http://www.quirksmode.org/js/cookies.html
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+"="+escape(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 unescape(c.substring(nameEQ.length,c.length));
	}
	return null;
}

function eraseCookie(name)
{
	createCookie(name,"",-1);
}

function setField(id)
{
	var f=document.getElementById(id);
	if (f == null) return;
	var v=readCookie(id);
	if (v == null) return;
	f.value = v;
}

function saveField(id)
{
	var f=document.getElementById(id);
	if (f == null) return;
	v = f.value;
	if (v == null) return;
	createCookie(id,v,120);
}

function setAllFields()
{
 	setField("poster");
	setField("email");
}

function saveAllFields()
{
 	saveField("poster");
	saveField("email");
}

if (window.addEventListener)
window.addEventListener("load", setAllFields, false)
else if (window.attachEvent)
window.attachEvent("onload", setAllFields)
else if (document.getElementById)
window.onload=setAllFields;
if (document.getElementById)
window.onunload=saveAllFields;