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- <script>
- window.onload = function () {
- var current_id = getCookie('current_id')
- if (!current_id) {
- current_id = 'first_page'
- }
- window.addEventListener('message', function(e){
- setCookie('current_id', e.data.current_id)
- }, false);
- window.parent.postMessage({pre_id: current_id}, '*');
- }
- function setCookie(name, value) {
- var Days = 30;
- var exp = new Date();
- exp.setTime(exp.getTime() + Days * 24 * 60 * 60 * 1000);
- document.cookie = name + "=" + escape(value) + ";expires=" + exp.toGMTString();
- }
- function getCookie(name) {
- var arr, reg = new RegExp("(^| )" + name + "=([^;]*)(;|$)");
- if (arr = document.cookie.match(reg))
- return decodeURIComponent(arr[2]);
- else
- return null;
- }
- </script>
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