使用jquery实现仿百度自动补全特效
新建index.html文件，直接复制下面代码到新建的文件index.html里面，用浏览器访问，仅用于参考:
<!doctypehtml>
<html>
<metacharset="utf-8">
<style>
body{
margin-left:0px;
margin-top:0px;
margin-right:0px;
margin-bottom:0px;
}
.auto_hidden{
width:204px;border-top:1pxsolid#333;
border-bottom:1pxsolid#333;
border-left:1pxsolid#333;
border-right:1pxsolid#333;
position:absolute;
display:none;
}
.auto_show{
width:204px;
border-top:1pxsolid#333;
border-bottom:1pxsolid#333;
border-left:1pxsolid#333;
border-right:1pxsolid#333;
position:absolute;
z-index:9999;/*设置对象的层叠顺序*/
display:block;
}
.auto_onmouseover{
color:#ffffff;
background-color:highlight;
width:100%;
}
.auto_onmouseout{
color:#000000;
width:100%;
background-color:#ffffff;
}
</style>
<scriptlanguage="javascript">
<!--
var$=function(id){
return"string"==typeofid?document.getElementById(id):id;
}
varBind=function(object,fun){
returnfunction(){
returnfun.apply(object,arguments);
}
}
functionAutoComplete(obj,autoObj,arr){
this.obj=$(obj);//输入框
this.autoObj=$(autoObj);//DIV的根节点
this.value_arr=arr;//不要包含重复值
this.index=-1;//当前选中的DIV的索引
this.search_value="";//保存当前搜索的字符
}
AutoComplete.prototype={
//初始化DIV的位置
init:function(){
this.autoObj.style.left=this.obj.offsetLeft+"px";
this.autoObj.style.top=this.obj.offsetTop+this.obj.offsetHeight+"px";
this.autoObj.style.width=this.obj.offsetWidth-2+"px";//减去边框的长度2px
},
//删除自动完成需要的所有DIV
deleteDIV:function(){
while(this.autoObj.hasChildNodes()){
this.autoObj.removeChild(this.autoObj.firstChild);
}
this.autoObj.className="auto_hidden";
},
//设置值
setValue:function(_this){
returnfunction(){
_this.obj.value=this.seq;
_this.autoObj.className="auto_hidden";
}
},
//模拟鼠标移动至DIV时，DIV高亮
autoOnmouseover:function(_this,_div_index){
returnfunction(){
_this.index=_div_index;
varlength=_this.autoObj.children.length;
for(varj=0;j<length;j++){
if(j!=_this.index){
_this.autoObj.childNodes[j].className='auto_onmouseout';
}else{
_this.autoObj.childNodes[j].className='auto_onmouseover';
}
}
}
},
//更改classname
changeClassname:function(length){
for(vari=0;i<length;i++){
if(i!=this.index){
this.autoObj.childNodes[i].className='auto_onmouseout';
}else{
this.autoObj.childNodes[i].className='auto_onmouseover';
this.obj.value=this.autoObj.childNodes[i].seq;
}
}
}
,
//响应键盘
pressKey:function(event){
varlength=this.autoObj.children.length;
//光标键"↓"
if(event.keyCode==40){
++this.index;
if(this.index>length){
this.index=0;
}elseif(this.index==length){
this.obj.value=this.search_value;
}
this.changeClassname(length);
}
//光标键"↑"
elseif(event.keyCode==38){
this.index--;
if(this.index<-1){
this.index=length-1;
}elseif(this.index==-1){
this.obj.value=this.search_value;
}
this.changeClassname(length);
}
//回车键
elseif(event.keyCode==13){
this.autoObj.className="auto_hidden";
this.index=-1;
}else{
this.index=-1;
}
},
//程序入口
start:function(event){
if(event.keyCode!=13&&event.keyCode!=38&&event.keyCode!=40){
this.init();
this.deleteDIV();
this.search_value=this.obj.value;
varvalueArr=this.value_arr;
valueArr.sort();
if(this.obj.value.replace(/(^\s*)|(\s*$)/g,'')==""){return;}//值为空，退出
try{varreg=newRegExp("("+this.obj.value+")","i");}
catch(e){return;}
vardiv_index=0;//记录创建的DIV的索引
for(vari=0;i<valueArr.length;i++){
if(reg.test(valueArr[i])){
vardiv=document.createElement("div");
div.className="auto_onmouseout";
div.seq=valueArr[i];
div.onclick=this.setValue(this);
div.onmouseover=this.autoOnmouseover(this,div_index);
div.innerHTML=valueArr[i].replace(reg,"<strong>$1</strong>");//搜索到的字符粗体显示
this.autoObj.appendChild(div);
this.autoObj.className="auto_show";
div_index++;
}
}
}
this.pressKey(event);
window.onresize=Bind(this,function(){this.init();});
}
}
//-->
</script>
<body>
<divalign="center"style="padding-top:50px">
<inputtype="text"style="width:300px;height:20px;font-size:14pt;"placeholder="请输入a或b模拟效果"id="o"onkeyup="autoComplete.start(event)">
</div>
<divclass="auto_hidden"id="auto"><!--自动完成DIV--></div>
<script>
varautoComplete=newAutoComplete('o','auto',['b0','b12','b22','b3','b4','b5','b6','b7','b8','b2','abd','ab','acd','accd','b1','cd','ccd','cbcv','cxf']);
</script>
</body>
</html>
以上所述就是本文的全部内容了，希望大家能够喜欢。