JavaScript实现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>
<p class="gover_search">
<p 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>
<p class="search_suggest" id="gov_search_suggest">
<ul>
</ul>
</p>
</p>
</p>
<script type="text/javascript" src="https://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>gt;'+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>
下一篇： 一个二级联动