<input type="button" value="按钮"

onclick="javascrtpt:window.location.href='http://www.baidu.com/'" />

<button onclick="window.location.href = 'https://www.baidu.com/'">百度</button>

<a href="http://www.baidu.com/">

    <button>百度</button>

</a>

<a href="http://www.baidu.com/"><input type="button" value='百度'></a>

<script>

function jump(){

 window.location.href="http://www.baidu.com/";

}

</script>

<input type="button" value="百度" onclick=javascrtpt:jump() />

// 或者<input type="button" value="百度" onclick="jump()" />

// 或者<button onclick="jump()">百度</button>