一个IP每天只弹一次广告窗口

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<title>每个IP每天只弹一次窗口/网页特效/www.qpsh.com</title>
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function setCookie(name, value, expire) {
  window.document.cookie = name + "=" + escape(value) + ((expire == null) ? "" : ("; expires=" + expire.toGMTString()));
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function getCookie(Name) {
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     offset = window.document.cookie.indexOf(search);
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       offset += search.length;
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    end = window.document.cookie.indexOf(";", offset)
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    if (end == -1)
      end = window.document.cookie.length;
    return unescape(window.document.cookie.substring(offset, end));
     }
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   return null;
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function register(name) {
  var today = new Date();
  var expires = new Date();
  expires.setTime(today.getTime() + 1000*60*60*24);
  setCookie("ItDoor", name, expires);
}
  var exitURL="http://write.blog.csdn.net/postedit";
function openWin() {
  var c = getCookie("ItDoor");
  if (c != null) {
    return;
  }
  register("xiaolin");

  var featureStr="''";

    featureStr="'top=0,left=0,width=800,height=600,toolbar=yes, menubar=no, scrollbars=no, resizable=no, location=no, status=no,center:no'";

  self.focus();

  var ExitWindow = window.open(exitURL,'', featureStr);
    ExitWindow.focus();

}
openWin();
window.focus()
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怎么样？再怎么刷新，他都不会弹了！只弹一次！
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