仿百度的关键词匹配搜索示例

代码如下:

<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>关键词匹配搜索仿百度</title>
<meta name="description" content=" 内容介绍不超过100个中文">
<meta name="keywords" content=" 内容相关关键词3-5个">
<style>
body, ul, li { margin: 0; padding: 0;}
body{ font-size:12px; font-family:sumsun,arial;background:#FFFFFF;}
.gover_search{ position:relative; z-index:99; height:63px; padding:15px 0 0 20px; border:1px solid #b8cfe6; border-bottom:0; background:url(../images/gover_search_bg.gif) repeat-x 0 0;}
.gover_search_form{height:36px;}
.gover_search .search_t{ float:left; width:112px; line-height:26px; color:#666;}
.gover_search .input_search_key{ float:left; width:462px; height:18px; padding:3px; margin-right:5px; border:1px solid #ccc; line-height:18px; background:#fff;}
.gover_search .search_btn{ float:left; width:68px; height:26px; overflow:hidden; border:1px solid #ccc; text-align:center; color:#ff3300; letter-spacing:5px; background:url(../images/gover_search_bg.gif) no-repeat 0 -79px; cursor:pointer; font-weight:bold;}
.gover_search .search_suggest{ position:absolute; z-index:999; left:132px; top:41px; width:468px; border:1px solid #ccc;border-top:none; display:none;color:#004080; }
.gover_search .search_suggest li{height:24px; overflow:hidden; padding-left:3px; line-height:24px; background:#fff; cursor:default;}
.gover_search .search_suggest li.hover{background:#ddd;}
.num_right{float:right;text-align:right;line-height:24px;padding-right:10px}
</style>
</head>

<body>

<div class="gover_search">
<div class="gover_search_form clearfix">
<span class="search_t">关键词匹配搜索</span>
<input type="text" class="input_search_key" id="gover_search_key" placeholder="请输入关键词直接搜索" />
<button type="submit" class="search_btn">搜索</button>
<div class="search_suggest" id="gov_search_suggest">
<ul>
</ul>
</div>
</div>
</div>
<script type="text/javascript" src="http://jt.875.cn/js/jquery.js"></script>

<script type="text/javascript">

//实现搜索输入框的输入提示js类
function oSearchSuggest(searchFuc){
var input = $('#gover_search_key');
var suggestWrap = $('#gov_search_suggest');
var key = "";
var init = function(){
input.bind('keyup',sendKeyWord);
input.bind('blur',function(){setTimeout(hideSuggest,100);})
}
var hideSuggest = function(){
suggestWrap.hide();
}

//发送请求，根据关键字到后台查询
var sendKeyWord = function(event){

//键盘选择下拉项
if(suggestWrap.css('display')=='block'&&event.keyCode == 38||event.keyCode == 40){
var current = suggestWrap.find('li.hover');
if(event.keyCode == 38){
if(current.length>0){
var prevLi = current.removeClass('hover').prev();
if(prevLi.length>0){
prevLi.addClass('hover');
input.val(prevLi.html());
}
}else{
var last = suggestWrap.find('li:last');
last.addClass('hover');
input.val(last.html());
}

}else if(event.keyCode == 40){
if(current.length>0){
var nextLi = current.removeClass('hover').next();
if(nextLi.length>0){
nextLi.addClass('hover');
input.val(nextLi.html());
}
}else{
var first = suggestWrap.find('li:first');
first.addClass('hover');
input.val(first.html());
}
}

//输入字符
}else{
var valText = $.trim(input.val());
if(valText ==''||valText==key){
return;
}
searchFuc(valText);
key = valText;
}

}
//请求返回后，执行数据展示
this.dataDisplay = function(data){
if(data.length<=0){
suggestWrap.hide();
return;
}

//往搜索框下拉建议显示栏中添加条目并显示
var li;
var tmpFrag = document.createDocumentFragment();
suggestWrap.find('ul').html('');
for(var i=0; i<data.length; i++){
li = document.createElement('LI');
li.innerHTML = data[i];
tmpFrag.appendChild(li);
}
suggestWrap.find('ul').append(tmpFrag);
suggestWrap.show();

//为下拉选项绑定鼠标事件
suggestWrap.find('li').hover(function(){
suggestWrap.find('li').removeClass('hover');
$(this).addClass('hover');

},function(){
$(this).removeClass('hover');
}).bind('click',function(){
$(this).find("span").remove();
input.val(this.innerHTML);
suggestWrap.hide();
});
}
init();
};

//实例化输入提示的JS,参数为进行查询操作时要调用的函数名
var searchSuggest = new oSearchSuggest(sendKeyWordToBack);

//这是一个模似函数，实现向后台发送ajax查询请求，并返回一个查询结果数据，传递给前台的JS,再由前台JS来展示数据。本函数由程序员进行修改实现查询的请求
//参数为一个字符串，是搜索输入框中当前的内容
function sendKeyWordToBack(keyword){
/* var obj = {
"keyword" : keyword
};
$.ajax({
type: "POST",
url: "${ctx}/front/suqiu2/search/prompt-keyword.action",
async:false,
data: obj,
dataType: "json",
success: function(data){
//var json = eval("("+data+")");
var key=data.split(",");
var aData = [];
for(var i=0;i<key.length;i++){
//以下为根据输入返回搜索结果的模拟效果代码,实际数据由后台返回
if(key[i]!=""){
aData.push(key[i]);
}
}
//将返回的数据传递给实现搜索输入框的输入提示js类
searchSuggest.dataDisplay(aData);
}
}); */

//以下为根据输入返回搜索结果的模拟效果代码,实际数据由后台返回
var aData = [];
aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据1');
aData.push('<span class="num_right">约200个</span>'+keyword+'返回数据2');
aData.push('<span class="num_right">约100个</span>'+keyword+'返回数据3');
aData.push('<span class="num_right">约50000个</span>'+keyword+'返回数据4');
aData.push('<span class="num_right">约1044个</span>'+keyword+'2012是真的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是真的');
aData.push('<span class="num_right">约100个</span>'+keyword+'2012是假的');
//将返回的数据传递给实现搜索输入框的输入提示js类
searchSuggest.dataDisplay(aData);
}
</script>
</body>
</html>