搜索框自动补全(仿百度搜索框)--不使用任何Javascript框架

Thinking_In_IT 2010-11-11 02:27:10

自己写了个：自动补全(仿百度搜索框)

输入：a或b或c 即可看到效果



<!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">

<!--

/*

通用: 自动补全(仿百度搜索框)

作者：nj-troy

时间：2010-11-101

*/

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>