自动完成实现
最近这段时间啥也不想写,也不想做什么,今闲来无事就分享一篇源码好了,无意间发现的一篇源码,我也不知道它是从哪里来的。这里测试的时候使用的是数组,实际使用的时候,我们换成Ajax从服务器端获取的方式就OK了。点击这里可以查看本地DEMO。
- <!doctype html>
- <html>
- <style>
- body {
- margin-left: 0px;
- margin-top: 0px;
- margin-right: 0px;
- margin-bottom: 0px;
- }
- .auto_hidden {
- width:204px;border-top: 1px solid #333;
- border-bottom: 1px solid #333;
- border-left: 1px solid #333;
- border-right: 1px solid #333;
- position:absolute;
- display:none;
- }
- .auto_show {
- width:204px;
- border-top: 1px solid #333;
- border-bottom: 1px solid #333;
- border-left: 1px solid #333;
- border-right: 1px solid #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>
- <script language="javascript">
- <!--
- var $ = function (id) {
- return "string" == typeof id ? document.getElementById(id) : id;
- }
- var Bind = function(object, fun) {
- return function() {
- return fun.apply(object, arguments);
- }
- }
- function AutoComplete(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){
- return function(){
- _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){
- return function(){
- _this.index=_div_index;
- var length = _this.autoObj.children.length;
- for(var j=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(var i=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){
- var length = this.autoObj.children.length;
- //光标键"↓"
- if(event.keyCode==40){
- ++this.index;
- if(this.index>length){
- this.index=0;
- }else if(this.index==length){
- this.obj.value=this.search_value;
- }
- this.changeClassname(length);
- }
- //光标键"↑"
- else if(event.keyCode==38){
- this.index--;
- if(this.index<-1){
- this.index=length - 1;
- }else if(this.index==-1){
- this.obj.value=this.search_value;
- }
- this.changeClassname(length);
- }
- //回车键
- else if(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;
- var valueArr=this.value_arr;
- valueArr.sort();
- if(this.obj.value.replace(/(^\s*)|(\s*$)/g,'')==""){ return; }//值为空,退出
- try{ var reg = new RegExp("(" + this.obj.value + ")","i");}
- catch (e){ return; }
- var div_index=0;//记录创建的DIV的索引
- for(var i=0;i<valueArr.length;i++){
- if(reg.test(valueArr[i])){
- var div = 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>
- <h1 align="center">自动完成函数(Autocomplete Function)</h1>
- <div align="center"><input type="text" style="width:300px;height:20px;font-size:14pt;" id="o" onkeyup="autoComplete.start(event)"></div>
- <div class="auto_hidden" id="auto"><!--自动完成 DIV--></div>
- <script>
- var autoComplete=new AutoComplete('o','auto',['b0','b12','b22','b3','b4','b5','b6','b7','b8','b2','abd','ab','acd','accd','b1','cd','ccd','cbcv','cxf']);
- </SCRIPT>
- </body>
- </html>
本文作者:季氏安安([既是安安]博客采用 BY-NC-SA 协议进行授权. 转载请保留此链接,谢谢。)
原文链接:http://www.jsann.com/post/automatically_to_achieve.html

1 条留言
我要留言房产抵押贷款 | 2011-8-24 15:09:52
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