<!-- SiteSearch Google -->
<form method="get" action="http://www.google.com/search">
        <div style="background-color:white">
                <a href="http://www.google.com/">
                        <img src="http://www.google.com/logos/Logo_40wht.gif" border="0" alt="Google" />
                </a>
                <input type="text" name="q" size="31" maxlength="255" value="html" />
                <input type="hidden" name="ie" value="GB2312" />
                <input type="hidden" name="oe" value="GB2312" />
                <input type="hidden" name="hl" value="zh-CN" />
                <input type="submit" name="btnG" value="Google Search" />
                <input type="hidden" name="domains" value="http://www.speed.com/" />
                <br />
                <input type="radio" name="sitesearch" value=" " />
                <label for="sitesearch">搜索WWW</label>
                <input type="radio" name="sitesearch" value="www.speed.com" checked="checked" />
                <label for="sitesearch">搜索uuspeed</label>
        </div>
</form>
<!-- SiteSearch Google -->

<!-- Baidu Search -->
<form method="get" action="http://www.baidu.com/baidu">
        <div style="background-color:white">
                <img src="http://img.baidu.com/img/logo-137px.gif" border="0" alt="baidu" />
                <input name="word" size="30" maxlength="100" value="html" />
                <input type="submit" value="Baidu Search" />
                <br />
                <input name="tn" type="hidden" value="bds" />
                <input name="cl" type="hidden" value="3" />
                <input name="si" type="hidden" value="www.speed.com" />
                <input name="ct" type="hidden" value="2097152" />
                <input name="s" type="radio" checked="checked" />
                <label for="s">搜索uuspeed</label>
        </div>
</form>

<!-- Baidu Search -->

http://www.dreamdu.com/webbuild/google_search/点击打开链接

<form method=get action="http://www.google.com/search">
<input type=text name=q onfocus="if(this.value=='请输入关键词...') {this.value='';}this.style.color='#313131';" onblur="if(this.value=='') {this.value='请输入关键词...';this.style.color='#313131';}" value="请输入关键词..." x-webkit-speech lang="zh-CN" onwebkitspeechchange="foo()" x-webkit-grammar="bUIltin:search" >
<input type=submit name=btnG value="Google 搜索" >
<input type=hidden name=ie value=GB2312>
<input type=hidden name=oe value=GB2312>
<input type=hidden name=hl value=zh-CN>
<input type=hidden name=domains value="www.speed.com" >
<input type=hidden name=sitesearch value="www.speed.com">
</form>

资料http://blog.sina.com.cn/s/blog_5446a5800100jw1m.html点击打开链接