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

function setCookie(c_name,value,expiredays)
{
var exdate=new Date()
exdate.setDate(exdate.getDate()+expiredays)
document.cookie=c_name+ "=" +escape(value)+
((expiredays==null) ? "" : ";expires="+exdate.toGMTString())
}

function getCookie(c_name)
{
if (document.cookie.length>0)
  {
  c_start=document.cookie.indexOf(c_name + "=")
  if (c_start!=-1)
    { 
    c_start=c_start + c_name.length+1 
    c_end=document.cookie.indexOf(";",c_start)
    if (c_end==-1) c_end=document.cookie.length
    return unescape(document.cookie.substring(c_start,c_end))
    } 
  }
return ""
}

function restoreRelease() {

	var previousReleaseId = getCookie('IBM_LOOKAT_RELEASE_ID');
	if (previousReleaseId) {

		var releases = getReleaseElements();
		for (i=0; i < releases.length; i++) {
			if (previousReleaseId == releases[i].id) {
				releases[i].checked = true;
			}
		}
	}
}

function saveRelease() {

	var releases = getReleaseElements();
	for (i=0; i < releases.length; i++) {
		if (releases[i].checked) {
			setCookie('IBM_LOOKAT_RELEASE_ID', releases[i].id, 365);
			break;
		}
	}
}

function getReleaseElements() {
	return document.getElementsByName('release');
}