function setCookie(name,value,expiry,path,domain) {
  var exp = new Date()
  exp.setDate(exp.getDate()+expiry)
  document.cookie = name + "=" + escape(value) +
                    ( (expiry==null) ? "" : ";expires=" + exp.toGMTString() ) +
                    ( (path==null) ? "" : "; path=" + path ) +
                    ( (domain==null) ? "" : "; domain=" + domain );
}


function save(id) {
  var ck
  eval("ck = document.form1.compare_" + id + ".checked")

  var days
  days = ck ? null : -1

  setCookie("compare_" + id, id, days, "/", ".ipodsuperstore.net")

}