<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Insert title here</title> <script type="text/javascript"> /* Open the same new page, the new page will not be opened again*/ function open1(){ window.open("html01.html","aaa"); } function open2(){ window.open("html02.html","aaa"); } </script> </head> <body> <a href="#" rel="external nofollow" rel="external nofollow" onclick="open1()">Click to enter 1</a> <a href="#" rel="external nofollow" rel="external nofollow" onclick="open2()">Click to enter 2</a> </body> </html>