dedecms首页搜索 添加仿百度下拉框

1:找到uploads/templets/default/head.htm

2: 找到

<input name="q" type="text" class="search-keyword" id="aa" value="在这里搜索..." onfocus="if(this.value=='在这里搜索...'){this.value='';}"

onkeydown="document.getElementById('ssxlk').style.display= 'block';"

oninput="_getvalue()"

onblur="if(this.value==''){this.value='在这里搜索...';}" />

添加 autocomplete="off" 系统input 默认autocomplete 为on

3:在相应位置添加一个div id="ssxlk"；

4:添加javascript代码:

<script type="text/javascript" src="ajax.js"></script>

<script type="text/javascript" >

function _getvalue()

{

var res = "id="+document.getElementById('aa').value;

//var gvalue = document.getElementByID().value;

getajax('ssxxl.php',res,b);

}

function b(a)

{

if(document.getElementById('aa').value=='')

{

document.getElementById('ssxlk').innerHTML='';

}

else

{

document.getElementById('ssxlk').innerHTML=a;

}

//alert(a);

}

</script>

5：ajax.js页面：

function getajax(url,j,responsefunction){

if(url){

var xhr=ajax();

xhr.open("POST",url,true);

xhr.onreadystatechange=function(){

if(xhr.readyState==4){

if(xhr.status==200){

responsefunction(unescape(xhr.responseText));

}else{

alert("页面读取失败");

}

}

};

xhr.setRequestHeader("Content-Type","application/x-www-form-urlencoded;");

xhr.send(j); //发送请求

}else{

alert("未知错误，请查识");

}

}

function ajax(){

var http_request;

if(window.XMLHttpRequest){

http_request=new XMLHttpRequest();

if(http_request.overrideMimeType){

http_request.overrideMimeType("text/xml");

}

}else if(window.ActiveXObject){

try{

http_request=new ActiveXObject("Msxml2.XMLHttp");

}catch(e){

try{

http_request=new ActiveXobject("Microsoft.XMLHttp");

}catch(e){

}

}

}

if(!http_request){

window.alert("创建XMLHttp对象失败！");

return false;

}

return http_request;

}

6：ssxxl.php页面

<?php

mysql_connect('localhost','root','root');

mysql_select_db('dedecms');

mysql_query('set names utf8');

$sql = "select `typename` from `dede_arctype` where `typename` like '%".$_POST['id']."%' limit 0,9;";

//print_r($sql);

$result = mysql_query($sql);

if($row = mysql_fetch_array($result))

{

do

{

echo $row[0];

echo "<br />";

}

while($row = mysql_fetch_array($result));

}

//echo 'aaaaaa';

?>

页面效果为: