模仿IE自动完成功能

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> 
<HTML> 
<HEAD> 
<TITLE> New Document </TITLE> 
<META NAME="Generator" CONTENT="EditPlus"> 
<META NAME="Author" CONTENT=""> 
<META NAME="Keywords" CONTENT=""> 
<META NAME="Description" CONTENT=""> 
<style> 
body,div { 
    font-family:verdana; 
    line-height:100%; 
    font-size:9pt; 
} 
input { 
    width:300px; 
} 
h1 { 
    text-align:center; 
    font-size:2.2em; 
} 
#divf { 
    margin:10px; 
    font-size:0.8em; 
    text-align:center; 
} 
#divc { 
    border:1px solid #333333; 
} 
.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"> 
<!--

// script by blueDestiny 
// email : blueDestiny [at] 126 . com

// Object: jsAuto 
// browser: ie, mf. 
// example:

// step1 :  
// create autocomplete container, return object and bind event to the object, and  
///create a new jsAuto instance: 
// <div id="divautocomplete"></div> 
// var autocomplete = new jsAuto("autocomplete","divautocomplete") 
// handle event: 
// autocomplete.handleEvent(value, returnObjectID) 
// <input id="rautocomplete" onkeyup="autocomplete.handleEvent(this.value,"ratocomplete",event)>

// step2 : 
// add autocompete item: 
// autocomplete.item(string) 
// string must be a string var, you can split the string by "," 
// autocomplete.item("blueDestiny,never-online,csdn,blueidea")

// http://www.never-online.com

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"; 
    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$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>

<BODY> 
<div id="divc"> 
     
</div> 
<h2>Autocomplete Function</h2> 
<div align="center"> 
<input onkeyup="jsAutoInstance.handleEvent(this.value,'auto',event)" id="auto"> 
</div> 
<div id="divf"> 
    Power By Miracle, never-online 
</div>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

模仿IE自动完成功能_javascript技巧