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function openURLs() { // create an array of URLs var urls = [ "https://kastaksh.exblog.jp/30617225/", "https://kastaksh.exblog.jp/30617242/", "https://kastaksh.exblog.jp/30617259/", "https://kastaksh.exblog.jp/30614274/", "https://kastaksh.exblog.jp/30614037/", "https://kastaksh.exblog.jp/30596594/", "https://kastaksh.exblog.jp/30589242/", "https://kastaksh.exblog.jp/30589199/", "https://kastaksh.exblog.jp/30589177/", "https://kastaksh.exblog.jp/30617282/", "https://kastaksh.exblog.jp/30617292/", "https://kastaksh.exblog.jp/30617310/", "https://kastaksh.exblog.jp/30617349/", "https://kastaksh.exblog.jp/30617340/", "https://kastaksh.exblog.jp/30617336/", "https://kastaksh.exblog.jp/30617337/", "https://kastaksh.exblog.jp/30617369/" ]; // loop through the array and open each URL in a new tab or window after 5 seconds for (var i = 0; i < urls.length; i++) { window.setTimeout(function() { window.open(urls[i], "_blank"); }, 5000); } }