简易自动完成功能实现-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_20816/article/details/81720382

<HTML>
<HEAD>

<title>还不太完善的完善自动完成JS，哈</title>
<style>
#divf {
	margin:10px;
	font-size:0.8em;
	text-align:center;
}
#divc {
	border:1px solid #333333;
	font-family:verdana;
	line-height:100%;
	font-size:9pt;
	float:none;
}
/*firefox得设置一下CSS位置**/
#divc {left:385px;top:604px;overflow;auto;height:250px;width:180px;visibility:hidden;position:absolute;zIndex:9999;}
.des {
	width:500px;
	background-color:lightyellow;
	border:1px solid #333;
	padding:20px;
	margin-top:20px;
}
.mouseover {
	color:#ffffff;
	background-color:highlight;
	width:100%;
	cursor:default;
}
.mouseout {
	color:#000000;
	width:100%;
	background-color:#ffffff;
	cursor:default;
}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!--
function jsAuto(instanceName,objID)
{
	this._msg = [];
	this._x = null;
	this._o = document.getElementById( objID );
	if (!this._o) return;
	this._f = null;
	this._i = instanceName;
	this._r = null;
	this._c = 0;
	this._s = false;
	this._v = null;
	this._o.style.visibility = "hidden";
	this._o.style.position = "absolute";
	this._o.style.zIndex = "9999";
	this._o.style.overflow = "auto";
	this._o.style.height = "250";
	return this;
};

jsAuto.prototype.directionKey=function() { with (this)
{
	var e = _e.keyCode ? _e.keyCode : _e.which;
	var l = _o.childNodes.length;
	(_c>l-1 || _c<0) ? _s=false : "";

	if( e==40 && _s )
	{
		_o.childNodes[_c].className="mouseout";
		(_c >= l-1) ? _c=0 : _c ++;
		_o.childNodes[_c].className="mouseover";
	}
	if( e==38 && _s )
	{
		_o.childNodes[_c].className="mouseout";
		_c--<=0 ? _c = _o.childNodes.length-1 : "";
		_o.childNodes[_c].className="mouseover";
	}
	if( e==13 )
	{
		if(_o.childNodes[_c] && _o.style.visibility=="visible")
		{
			_r.value = _x[_c];
			_o.style.visibility = "hidden";
		}
	}
	if( !_s )
	{
		_c = 0;
		_o.childNodes[_c].className="mouseover";
		_s = true;
	}
}};

// mouseEvent.
jsAuto.prototype.domouseover=function(obj) { with (this)
{
	_o.childNodes[_c].className = "mouseout";
	_c = 0;
	obj.tagName=="DIV" ? obj.className="mouseover" : obj.parentElement.className="mouseover";
}};
jsAuto.prototype.domouseout=function(obj)
{
	obj.tagName=="DIV" ? obj.className="mouseout" : obj.parentElement.className="mouseout";
};
jsAuto.prototype.doclick=function(msg,callback) { with (this)
{
	if(_r)
	{
		_r.value = msg;
		_o.style.visibility = "hidden";
		// 回调函数，当鼠标选择时候触发，参数：选择项值
		if(callback) {
			callback(_r.value);
		}
	}
	else
	{
		alert("javascript autocomplete ERROR :nn can not get return object.");
		return;
	}
}};

// object method;
jsAuto.prototype.item=function(msg)
{
	if( msg.indexOf(",")>0 )
	{
		var arrMsg=msg.split(",");
		for(var i=0; i<arrMsg.length; i++)
		{
			arrMsg[i] ? this._msg.push(arrMsg[i]) : "";
		}
	}
	else
	{
		this._msg.push(msg);
	}
	this._msg.sort();
};
jsAuto.prototype.append=function(msg,isAll,callback) { with (this)
{
	_i ? "" : _i = eval(_i);
	_x.push(msg);
	var div = document.createElement("DIV");

	//bind event to object.
	div.onmouseover = function(){_i.domouseover(this)};
	div.onmouseout = function(){_i.domouseout(this)};
	div.onclick = function(){_i.doclick(msg,callback)};
	var re  = new RegExp("(" + _v + ")","i");
	div.style.lineHeight="140%";
	div.className = "mouseout";
	if(isAll) {
		div.innerHTML = msg;
	}else {
		if (_v) div.innerHTML = msg.replace(re , "<strong>$1</strong>");
	}
	div.style.fontFamily = "verdana";

	_o.appendChild(div);
}};
jsAuto.prototype.display=function(positionLeft, positionTop) { with(this)
{
	if(_f&&_v!="")
	{
		if(positionLeft) {
			left = positionLeft;
		}else {
			left = _r.offsetLeft;
		}
		if(positionTop) {
			top = positionTop;
		}else {
			top = _r.offsetTop;
		}
		_o.style.left = left;
		_o.style.width = _r.offsetWidth;
		_o.style.top = top + _r.offsetHeight;
		_o.style.visibility = "visible";
	}
	else
	{
		_o.style.visibility="hidden";
	}
}};
jsAuto.prototype.handleEvent=function(fValue,fID,event,isAll,positionLeft,positionTop,callback) { with (this)
{
	var re;
	_e = event;
	var e = _e.keyCode ? _e.keyCode : _e.which;
	_x = [];
	_f = false;
	_r = document.getElementById( fID );
	_v = fValue;
	_i = eval(_i);
	var regexValue = "";
	if(isAll) {	// 显示所有
		regexValue = ".";
	}else {
		regexValue = fValue;
	}
	re = new RegExp("^" + regexValue + "", "i");
	_o.innerHTML="";

	for(var i=0; i<_msg.length; i++)
	{
		if(re.test(_msg[i]))
		{
			_i.append(_msg[i],isAll,callback);
			_f = true;
		}
	}

	_i ? _i.display(positionLeft,positionTop) : alert("can not get instance");

	if(_f)
	{
		if((e==38 || e==40 || e==13))
		{
			_i.directionKey();
		}
		else
		{
			_c=0;
			_o.childNodes[_c].className = "mouseover";
			_s=true;
		}
	}
}};
window.onerror=new Function("return true;");
//-->
</SCRIPT>
</HEAD>

<BODY>
<div id="divc">
	<!--this is the autocomplete container.-->
</div>
<h1>Autocomplete Function</h1>
<div align="center">
<input onkeyup="jsAutoInstance.handleEvent(this.value,'auto',event,false)" id="auto">
</div>
<!--onkeyup="jsAutoInstance.handleEvent(this.value,'auto',event,false,385,593,complateLinkSpUrl)"
《索值，input ID，事件，是否显示全部[,如果样式存在冲突，可绝对定位（left,top),回调函数]》[]为可选
-->
<div id="divf">
	匹配词容器
</div>

<SCRIPT LANGUAGE="JavaScript">
<!--
var jsAutoInstance = new jsAuto("jsAutoInstance","divc");
jsAutoInstance.item("a-start,b-start,c-start,d-start,e-start,f-start,g-start,h-start,i-start,j-start,k-start,l-start,m-start,n-start,o-start,p-start,q-start,r-start,s-start,t-start,u-start,v-start,w-start,x-start,y-start,z-start,z-start");
//-->
</SCRIPT>
<center>请随便输入一个字母看看 -_-</center>
</BODY>
</HTML>