看到一些网站上添加了各种搜索引擎。如Google、百度、360、有道等，就有点好奇，这个怎么实现？研究了一各个搜索引擎怎么传送关键字，找到了小窍门，于是乎，自家弄了一个百家搜索：

效果：

演示地址戳此：

ps：在列表中添加了糯米汇（）的站内搜索，仅用于演示，别无它用，特此声明。

HTML代码：

    
             
     
                  
      
                       
       
                            
        
         百度                    
         
百度
                    
         
谷歌
                    
         
必应
                    
         
有道
                    
         
搜搜
                    
         
搜狗
                    
         
360
                    
         
爱淘宝
                    
         
亚马逊
                    
         
当当
                    
         
知道
                    
         
维基
                    
         
Crea
                    
         
          糯米汇                                                    
                                  
                          
          
           出处：
           
            淡忘~浅思    
           
          
         
        
       
      
     
    

JavaScript：

window.onload = function()        {            var selectul = document.getElementById('selectul');            var lis = selectul.getElementsByTagName('li');            var selectedli = document.getElementById('selectedli');            var findParam = document.getElementById('findParam');            var sform = document.getElementById("sform");            var lislen = lis.length;            for (var i = 0; i < lislen; i++) {                lis[i].onmouseover=function()                {                    selectul.style.overflow = "visible";                };                lis[i].onmouseout=function()                {                    selectul.style.overflow = "hidden";                };                lis[i].onclick = function()                {                    selectedli.innerHTML = this.innerHTML;                    switch(this.innerHTML)                    {                        case "百度":                             findParam.name='wd';                             sform.action = "http://www.baidu.com/s";                             break;                        case "谷歌":                             findParam.name='q';                              sform.action = "http://www.google.com.hk/search";                             break;                        case "必应":                             findParam.name='q';                              sform.action = "http://cn.bing.com/search";                             break;                        case "有道":                             findParam.name='query';                              sform.action = "http://www.sogou.com/web";                             break;                        case "搜搜":                             findParam.name='w';                              sform.action = "http://www.soso.com/q";                             break;                        case "搜狗":                             findParam.name='q';                              sform.action = "http://www.youdao.com/search";                             break;                        case "360":                             findParam.name='q';                              sform.action = "http://www.youdao.com/search";                             break;                        case "爱淘宝":                             findParam.name='key';                              sform.action = "http://ai.taobao.com/search/index.htm";                             break;                         case "亚马逊":                             findParam.name='field-keywords';                              sform.action = "http://www.amazon.cn/s/ref=nb_sb_noss";                             break;                         case "当当":                             findParam.name='key';                              sform.action = "http://search.dangdang.com/";                             break;                         case "知道":                             findParam.name='word';                              sform.action = "http://zhidao.baidu.com/search";                             break;                         case "维基":                             findParam.name='search';                              sform.action = "ttp://zh.wikipedia.org/w/index.php";                             break;                         case "Crea":                             findParam.name='q';                              sform.action = "http://search.creativecommons.org/";                             break;                         case "糯米汇":                             findParam.name='s';                              sform.action = "http://www.nuomihui.com/";                             break;                    }                    selectul.style.overflow = "hidden";                };                };        };