<input type="button" value="http://www.mamicode.com/location" onclick="window.location=‘index1.html‘">    <input type="button" value="http://www.mamicode.com/assign" onclick="location.assign(‘index1.html‘)">    <input type="button" value="http://www.mamicode.com/open" onclick="window.open(‘index1.html‘)">    <form target="_blank" action="index1.html">        <input type="submit" value="http://www.mamicode.com/new">    </form>