高仿google suggest ajax示例

发布者:本站　发布时间:2010/3/1 11:38:52

前段时间想用google suggest在网上找了很多都不尽人意,于是自己花了些时间写了一个,跟google suggest 基本一样,后面的约多少结果非本程序范围哦

需要修改的地方有

javascript.js

var url="ajax.asp"; //后台地址
var time_delayajax=300; //搜索延迟
var time_delayupdown=100; //方向键延迟
obj_div.style.top = (xtop + 20) + "px"; //20差不多是输入框的高度,请根据实际情况调整
ajax_xmlhttp.send("sift_value="+escape(temp_value)); //提交到后台的值

dd=d+"<li onmouseover=\"overli("+i+");\" onmousedown=\"downli("+i+")\" onmouseup=\"upli("+i+",event)\" onmousemove=\"moveli();\"><span>约"+c[1]+"结果</span>"+c[0]+"</li>";//****li的显示

后台输出结果格式必需为'文本1,文本2'..... 'java,2''javascript,11''java示例,22'等

default.css

.ajaxsearch {
width:300px; //提示层的宽度
}

首页index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="default.css" />
<script language="JavaScript" src="javascript.js" type="text/javascript"></script>
<title>Google suggest高仿示例</title>
</head>

<body onResize="removediv();">
<div style="margin:20px 50px">
<input style="width:298px;height:18px" type="text" autocomplete="off" onBlur="blurdeal();" onKeyDown="keydowndeal(event);" onFocus="focusdeal(event);" />
</div>
</body>
</html>

脚本javascript.js

///////////////////////////////搜索提示框/////////////////////////////////
var obj_div;     //提示层对象
var obj_input;     //输入框对象
var main_delay;     //判断值变化延迟对象
var ajax_delay;     //ajax延迟搜索对象
var updown_delay;    //方向键延迟对象
var ajax_xmlhttp;    //ajax对象
var div_word=null;    //当前提示层对应的搜索值
var li_num=-1;     //伪光标位置,提示层被选中的li序号,从0开始
var li_down=-1;     //鼠标按下提示层的序号
var value_ed='';    //输入框延迟前的值
var value_ing='';    //输入框当前的值
var value_unexit='';   //搜索过没有结果的值开头
var updown_run=false;   //允许方向键上下
var ajax_run=false;    //true为正常进程,false停止ajax
var ajax_run_ing=false;   //true正在运行,false空闲
var input_focus=false;   //文本框焦点
var url='ajax.asp';    //后台地址**********************************************************
var time_delayajax=300;   //搜索延迟**********************************************************
var time_delayupdown=100; //方向键延迟********************************************************

var $=function(Fun_id){
return document.getElementById(Fun_id);
}
try{
ajax_xmlhttp= new ActiveXObject('Msxml2.XMLHTTP');
}catch(e){
try{
ajax_xmlhttp= new ActiveXObject('Microsoft.XMLHTTP');
}catch(e){
try{
   ajax_xmlhttp= new XMLHttpRequest();
}catch(e){ajax_xmlhttp=null;}
}
}
////////////////////////创建提示层////////////////////////
function createajaxdiv(){
var create_div = document.createElement('div');
create_div.type = 'div';
var promptdiv = document.body.appendChild(create_div);
promptdiv.className = 'ajaxsearch';
obj_div=promptdiv;
}
////////////////////////设置提示层位置////////////////////////
function removediv(){
if(!obj_div || !obj_input)return false;
if(obj_div.style.display=='none')return false;
var obj=obj_input;
var xtop=0;
var xleft=0;
while(obj){
xtop += obj['offsetTop'];
xleft += obj['offsetLeft'];
obj = obj.offsetParent;
}
obj_div.style.left = xleft + 'px';
obj_div.style.top = (xtop + 20) + 'px';    //20差不多是输入框的高度,请根据实际情况调整************************************************************8
li_down=-1;
}
////////////////////////隐藏提示层////////////////////////
function hideajaxdiv(){
obj_div.style.display='none';
li_down=-1;
}
////////////////////////设置被选<li>css样式////////////////////////
function setlistyle(){
for(var i=0;i<obj_div.firstChild.childNodes.length;i++){
obj_div.firstChild.childNodes[i].id='';
}
if(li_num!=-1)obj_div.firstChild.childNodes[li_num].id='liseleted';
}
////////////////////////鼠标经过提示层////////////////////////
function overli(Fun_seletedlinum){
if(li_num==-1)value_ing=obj_input.value;
li_num=Fun_seletedlinum;
setlistyle();
}
////////////////////////鼠标拖动提示层////////////////////////
function moveli(){
if(window.getSelection){
setfocus();
window.getSelection().removeAllRanges();
}else{
document.selection.empty();
setfocus();
}
}
////////////////////////鼠标按下提示层////////////////////////
function downli(Fun_seletedlinum){
if(!obj_input)return false;
li_down=Fun_seletedlinum;
input_focus=true;
}
////////////////////////鼠标弹起提示层////////////////////////
function upli(Fun_seletedlinum,Fun_event){
if(!obj_input)return false;
if(Fun_event.button==2){li_down=-1;return}
if(li_down!=Fun_seletedlinum){
li_down=-1;
return false;
}
clearTimeout(ajax_delay);
clearTimeout(updown_delay);
updown_run=true;
ajax_run=false;
ajax_run_ing=false;
li_num=-1;
div_word=null;

value_ed=obj_div.firstChild.childNodes[Fun_seletedlinum].childNodes[1].nodeValue;
obj_input.value=value_ed;
value_ing=value_ed;
hideajaxdiv();
obj_div.innerHTML='';
}
////////////////////////设置文本框获取焦点///////////////////////
function setfocus(){
if(window.event){
var r = obj_input.createTextRange();
r.moveStart('character',obj_input.value.length);
r.collapse(true);
r.select();
}else{
obj_input.selectionStart=obj_input.value.length;
obj_input.focus();
}
}
////////////////////////文本框失去焦点////////////////////////
function blurdeal(){
if(input_focus==true){
setfocus();
setTimeout('setfocus()');
return false;
}
updown_run=false;
ajax_run=false;
ajax_run_ing=false;
clearInterval(main_delay);
clearTimeout(ajax_delay);
clearTimeout(updown_delay);
hideajaxdiv();
if(value_ed!=obj_input.value)obj_div.innerHTML='';
}
////////////////////////文本框获取焦点////////////////////////
function focusdeal(Fun_event){
if(!obj_div)createajaxdiv();
if(input_focus==true){
input_focus=false;
return false;
}
var obj=((window.event)?Fun_event.srcElement:Fun_event.target);
if(obj.type!='text')return false;
updown_run=true;
ajax_run=true;
ajax_run_ing=false;
if(obj_input==obj && value_ed==obj.value && obj_div.innerHTML!=''){
obj_div.style.display='block';
removediv();
}else{
obj_input=obj;
value_ed=obj.value;
value_ing=obj.value;
value_unexit='';
li_num=-1;
li_down=-1;
div_word=null;
obj_div.innerHTML='';
removediv();
}
main_delay=setInterval('mainajax()',10);
}
////////////////////////主函数////////////////////////
function mainajax(){
if(value_ed==obj_input.value)return false;
if(value_unexit!='' && (obj_input.value).indexOf(value_unexit)==0){hideajaxdiv();obj_div.innerHTML='';return false;}
if(value_ed!=obj_input.value && ajax_run_ing==false){
ajax_run=true;
value_ed=obj_input.value;
clearTimeout(ajax_delay);
if(obj_input.value!=''){
   ajax_delay=setTimeout('getsearch();',time_delayajax);
}else{
   hideajaxdiv();
   obj_div.innerHTML='';
   ajax_run=false;
return false;

}
}
}
////////////////////////获取搜索内容////////////////////////
function getsearch(){
var temp_value=obj_input.value;
if(ajax_xmlhttp==null){
return false;
}else if(ajax_xmlhttp.readyState!=0){
ajax_xmlhttp.abort();
ajax_run_ing=false;
}
ajax_xmlhttp.onreadystatechange=function(){
if(ajax_run==false){ajax_xmlhttp.abort();ajax_run_ing=false;return false;}
if(ajax_xmlhttp.readyState==4){
   obj_div.innerHTML='';
if(ajax_xmlhttp.status==200 || ajax_xmlhttp.status==304){
    var contant=ajax_xmlhttp.responseText;
    if(contant!='' && ajax_run==true){
     div_word=temp_value;
     obj_div.innerHTML=resetcontant(contant);
     obj_div.style.display='block';
     removediv();removediv();
    }else{
     hideajaxdiv();
    }
    updown_run=true;
    ajax_run_ing=false;
    li_num=-1;
    if(contant=='')value_unexit=temp_value;
   }
}
}
ajax_xmlhttp.open('post',url,true);
ajax_xmlhttp.setRequestHeader('Content-type','application/x-www-form-urlencoded');
ajax_run_ing=true;
ajax_xmlhttp.send('sift_value='+escape(temp_value)); //提交到后台的值*****************************************
}
////////////////////////内容重组///////////////////////
function resetcontant(Fun_contant){
if(Fun_contant==null || Fun_contant=='')return '';
var a=Fun_contant.substring(1,Fun_contant.length-1);
if(Fun_contant==null || Fun_contant=='')return '';
var b=a.split('''');
var c;
var d;
d='<ul>';
for(var i in b){
c=b[i].split(',');
//***************************************************************
d=d+'<li onmouseover=\'overli('+i+');\' onmousedown=\'downli('+i+')\' onmouseup=\'upli('+i+',event)\' onmousemove=\'moveli();\'><span>约'+c[1]+'结果</span>'+c[0]+'</li>';
//***************************************************************
}
d=d+'<li onmousedown=\'input_focus=true;li_down=-1;\' onmouseup=\'li_down=-1\' onmousemove=\'moveli();\'><span><a class=\'shutajaxdiv\' onclick=\'hideajaxdiv();\'>关闭</a></span></li>'
d=d+'</ul>';
return d;
}
////////////////////////键盘事件////////////////////////
function keydowndeal(Fun_event){
var keyc=((window.event)?Fun_event.keyCode:Fun_event.which);
if(keyc==13){hideajaxdiv();return false;}
if(keyc==27){
if(obj_div.style.display=='block' && li_num>-1)value_ed=obj_input.value=value_ing;
hideajaxdiv();
return false;
}
if(keyc==40 || keyc==38){
if(div_word==obj_input.value && obj_div.style.display=='none' && obj_div.innerHTML!=''){
   obj_div.style.display='block';
   removediv();
return false;
}
if(li_num==-1){
if(div_word!=obj_input.value)return false;
}else{
if(div_word!=value_ing)return false;
}
if(updown_run==false || ajax_run_ing==true || obj_div.style.display=='none')return false;
updown_delay=setTimeout('updownli('+keyc+')',time_delayupdown);
updown_run=false;
}
}
////////////////////////方向键移动li////////////////////////
function updownli(Fun_key){
if(!obj_div){return false;}
updown_run=true;
if(li_num==-1){
if(div_word!=obj_input.value){hideajaxdiv();obj_div.innerHTML='';li_num=-1;return false;}
}else{
if(div_word!=value_ing){hideajaxdiv();obj_div.innerHTML='';li_num=-1;return false;}
}
if(updown_run==false)return false;
if(li_num==-1)value_ing=value_ed;
if(Fun_key==40){
if(li_num<obj_div.firstChild.childNodes.length-2){
   li_num++;
}else{
   li_num=-1;
}
}
if(Fun_key==38){
if(li_num>=0){
   li_num--;
}else{
   li_num=obj_div.firstChild.childNodes.length-2;
}
}
if(li_num!=-1){
value_ed=obj_input.value=obj_div.firstChild.childNodes[li_num].childNodes[1].nodeValue;
}else{
value_ed=obj_input.value=value_ing;
}
setlistyle();
}

后台ajax.asp

<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001" %>
<%option explicit%>
<%Response.CodePage="65001"%>
<%Response.Charset="utf-8" %>

<%
dim Sift_value
dim Sql,Rs,I,Num
dim Contant
Contant=""
Num=10
Sift_value=replace(unescape(request.form("sift_value")),"""","""""")

Sql="select top "&Num&" keyword,matchnum from search where keyword like """&Sift_value&"%"" order by id"

set Rs=server.CreateObject("adodb.recordset")
Rs.open Sql,Conn,1,1
if not (Rs.eof and Rs.bof) then
for I=0 to Num-1
Contant=Contant&"'"&rs(0)&","&rs(1)&"'"
Rs.movenext
if Rs.eof then exit for
next
end if
response.Write(Contant)
Rs.close
set Rs=nothing
%>

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