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                            AJAX教程
 
                        - Ajax自动补全(仿百度效能) 
 
                         
                    
                    
                    日期:2014-05-16  浏览次数:20746 次 
                    
                        
                         Ajax自动补全(仿百度功能)
    <!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=gb2312" />
<title>搜索</title>
<style type="text/css">
<!--
* {margin: 0px;padding: 0px;}
body {
	text-align: center;
	padding-top: 100px;
	font-size: 12px;
}
table {margin: auto;}
#wd {width: 350px;}
div#s {position: relative;}
div#ss {position: absolute;width: 352px;visibility: hidden;left: 0px;top: 20px;}
div#ss ul {border: 1px solid #000000;text-align: left;}
div#ss li {
	position: relative;
	width: 100%;
	background-color: #FFFFFF;
	cursor: default;
	line-height: 18px;
	text-indent: 2px;
}
div#ss li.b {background-color: #6666FF;color: #FFFFFF;}
div#ss li.hov span {color: #99FFFF;}
div#ss li span {color: #009900;position: absolute;top: 0px;right: 2px;}
UL {list-style-type: none;}
-->
</style>
</head>
<script language="javascript">
function $(d){return document.getElementById(d);}
var IE=new Function('','if(navigator.appName.indexOf("Explorer")>=0)return true;if(navigator.appName.indexOf("Netscape")>=0)return false');
var sou = function ()
{
 var shuru = $("wd");
 var shuchu = $("ss");
 var sxPress = false ;
 var oldValue; 
shuchu.onmouseover = function (e)
{
 e||(e=window.event);
 var eveSrc = (typeof e.target != "undefined")?e.target:e.srcElement;
 eveSrc = eveSrc.tagName=="SPAN"?eveSrc.parentNode:eveSrc;
 if(eveSrc.tagName=="LI")
 {
 var eveParent = eveSrc.parentNode;
 for(i=0;i<eveParent.childNodes.length;i++)
 eveParent.childNodes[i].className = "";
 eveSrc.className="hov";
 }
}//end onmouseover
function down(e)
{
 e||(e=window.event);
 var eveSrc = (typeof e.target != "undefined")?e.target:e.srcElement;
 if(eveSrc.tagName=="LI"){
   if(eveSrc.parentNode.parentNode.id=="ss")
  {
    //shuru.value = eveSrc.firstChild.data;
    document.forms["form1"].submit();
	return;
   }
 }
 if(eveSrc==shuru)return;
 shuchu.style.visibility="hidden";
}//end down
document.onmousedown = down;
shuru.onkeydown = function (e)
 {
   e||(e=window.event);
    switch(e.keyCode){
	  case 40:
	  if(shuchu.style.visibility=="hidden")return;
	  sxPress = true;
	  var ele = shuchu.firstChild.childNodes;
	  var thisEle = new Object();
	  for(i=0;i<ele.length;i++)
	  if(ele[i].className=="hov")
	  {thisEle = ele[i];break;}
	  if(typeof thisEle.className=="undefined")
	  {
	  thisEle = ele[0];
	  thisEle.className = "hov";
	  shuru.value=thisEle.firstChild.data;
	  return;
	  }
	  thisEle.className = "";
	  if(thisEle==ele[ele.length-1]){shuru.value = oldValue; return;}
	  shuru.value = thisEle.nextSibling.firstChild.data;
	  thisEle.nextSibling.className = "hov";
      break;
	  
	  case 38:
	  if(shuchu.style.visibility=="hidden")return;
	  sxPress = true;
	  var ele = shuchu.firstChild.childNodes;
	  var thisEle = new Object();
	  for(i=0;i<ele.length;i++)
	  if(ele[i].className=="hov")
	  {thisEle = ele[i];break;}
	  if(typeof thisEle.className=="undefined")
	  {
	  thisEle = ele[ele.length-1];
	  thisEle.className = "hov";