仿百度輸入框自動(dòng)匹配功能的JS代碼_表單按鈕特效

現(xiàn)在很多網(wǎng)站都有這種效果，在文本框輸入一個(gè)字符，下邊會(huì)出來(lái)相匹配的內(nèi)容，這個(gè)代碼就演示了這個(gè)功能是如何完成的，當(dāng)然，這是個(gè)靜態(tài)的，你可以將提示的內(nèi)容從數(shù)據(jù)庫(kù)讀取出來(lái)，要用到AJAX那東東。

<title>帶輸入匹配的文本框</title>
<style>
body,div {
	font-family:verdana;
	line-height:100%;
	font-size:10pt;
}
input {
	width:320px;
}
h1 {
	text-align:center;
	font-size:2.2em;
}
#divc {
	border:1px solid #555;
}
.des {
	width:500px;
	background-color:lightyellow;
	border:1px solid #555;
	padding:25px;
	margin-top:25px;
}
.mouseover {
	color:#ffffff;
	background-color:highlight;
	width:100%;
	cursor:default;
}
.mouseout {
	color:#000;
	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 = "50";
	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) { with (this)
{
	if(_r)
	{
		_r.value = msg;
		_o.style.visibility = "hidden";
	}
	else
	{
		alert("javascript autocomplete ERROR :\n\n 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) { 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)};
	var re  = new RegExp("(" + _v + ")","i");
	div.style.lineHeight="140%";
	div.className = "mouseout";
	if (_v) div.innerHTML = msg.replace(re , "<strong>$1</strong>");
	div.style.fontFamily = "verdana";

_o.appendChild(div);
}};
jsAuto.prototype.display=function() { with(this)
{
	if(_f && _v!="")
	{
		_o.style.left = _r.offsetLeft;
		_o.style.width = _r.offsetWidth;
		_o.style.top = _r.offsetTop + _r.offsetHeight;
		_o.style.visibility = "visible";
	}
	else
	{
		_o.style.visibility="hidden";
	}
}};
jsAuto.prototype.handleEvent=function(fValue,fID,event) { 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);
	re = new RegExp("^" + fValue + "", "i");
	_o.innerHTML="";

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

_i ? _i.display() : 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>

<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
<center>請(qǐng)?jiān)谳斎肟蜉斎胍粋€(gè)字母：</center>
</BODY>
</HTML>

所屬頻道：表單按鈕特效/更新時(shí)間：2013-04-16

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表單按鈕模板-仿百度輸入框自動(dòng)匹配功能的JS代碼。

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