button onclik="???" -> open url in the current tab

button onclik="???" -> open url in the current tab


How open a url in the current tab, a <button> using onclik (via ajax)?
My Tabs is Ajax:
<div id="tabs">
<ul>
<li><a href="content1.html">Tab1</a></li>
<li><a href="content2.html">Tab2</a></li>
<li><a href="content3.html">Tab2</a></li>
</ul>
</div>
In content1.html:
<button onclick="???">open otherpage.html</button>
Help-me please!
Thanks.
Sorry my bad english.
endereco izotermi
rua jose vitorino pereira 303 vl sao roque ou sapopemba