参考网站：/
上图为实现效果
代码如下：
<script>function butClick() {var val = document.getElementById("search_key").value;if(val.length === 0){alert('搜索为空，请输入内容');return false;}else{var open_url = "/s?ie=utf-8&wd=" + val;window.open(open_url); }}document.onkeydown = function (e) {var theEvent = window.event || e;var code = theEvent.keyCode || theEvent.which || theEvent.charCode;if (code == 13) {butClick();}}</script><div class="layui-clear"> <a href="" class="baidulogo" target="_blank"> <img src="/www_moban_kim-images/bd_logo.png"></a><input type="search" id="search_key"><a class="btn" target="_blank" href="javascript:void(0)" onclick="butClick();">百度一下</a> </div>
上面代码简单解释一下，其中下面代码
<script>function butClick() {var val = document.getElementById("search_key").value;if(val.length === 0){alert('搜索为空，请输入内容');return false;}else{var open_url = "/s?ie=utf-8&wd=" + val;window.open(open_url); }}document.onkeydown = function (e) {var theEvent = window.event || e;var code = theEvent.keyCode || theEvent.which || theEvent.charCode;if (code == 13) {butClick();}}</script>
js获取到表单的数据，把获取到的，数据和百度搜索URL拼接，然后直接跳转到百度
<div class="layui-clear"> <a href="" class="baidulogo" target="_blank"> <img src="/www_moban_kim-images/bd_logo.png"></a><input type="search" id="search_key"><a class="btn" target="_blank" href="javascript:void(0)" onclick="butClick();">百度一下</a> </div>
上面这段是样式，也就是开头最终实现的样子
这段代码中javascript:void(0)" οnclick="butClick(); 这个是不能变更的，如果你是大神，变更成什么样子，你可以自己来，我不是大神，建议不要更改
下面的代码是直接搜索，不跳转到新页面的
<script>function butClick() {var val = document.getElementById("search_key").value;if(val == "" || val == null || val == 'undefined'){alert('搜索为空，请输入内容');return false;}else{window.location.href = "/s?ie=utf-8&wd=" + val;}}document.onkeydown = function (e) {var theEvent = window.event || e;var code = theEvent.keyCode || theEvent.which || theEvent.charCode;if (code == 13) {butClick();}}</script><div class="layui-clear"> <a href="" class="baidulogo" target="_blank"> <img src="/www_moban_kim-images/bd_logo.png"></a><input type="search" id="search_key"><a class="btn" target="_blank" href="javascript:void(0)" onclick="butClick();">百度一下</a> </div>
这个代码感谢大神：4414站长论坛：小千 ，个人主页/home.php?mod=space&uid=10367，的无私解决问题，感谢感谢！
