通过键盘上下左右键选择文字并显示在文本框中-JS特效-爱易网页

通过键盘上下左右键选择文字并显示在文本框中

日期：2014-05-18　浏览次数：20180 次

以下是程序代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
 <head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <title>SimulateUpDownKeySelect.html</title>
<style type="text/css">
#divSelect {border:1px solid red; width:208px !important;width:210px;}
#divSelect ul {width:200px;margin:3px; margin-left:-35px;*margin-left:3px;overflow:hidden}
#divSelect ul li {float:left; list-style-type:none;width:45px;height:14px;line-height:20px;font:14px arial;text-align:center;padding:2px}
#divSelect li:hover {background :green;cursor:pointer}
#txtInput {width:205px;}
</style>
 </head>
 <body>
<form method="post" action="##">
<input type="text" id="txtInput" value="" autocomplete="off"  onkeydown="if(event.keyCode==13)return false;" />

<div id="divSelect">
</div>
<script type="text/javascript">
var list="<ul>"
list+="<li>123a</li><li>战争片</li><li>动作片</li><li>爱情片</li><li>剧情片</li><li>记录片</li><li>fbac</li><li>bbca</li><li>defe</li><li>gzza</li><li>恐怖片</li><li>古装片</li><li>电视剧</li><li>读书</li><li >小说</li><li>作品集</li><li>历史</li><li>诗歌</li><li >散文</li><li>军事</li>";
list+="</ul>"
document.getElementById('divSelect').innerHTML=list;
</script>
</form>
 <script type="text/javascript">
 <!--
function $(sId)
{
    return document.getElementById(sId);
}
function clearSelectedOptBgColor(target)
{
    if (target.seletedIndex >= 0)
        target.options[target.seletedIndex].style.background = "";
}
function setSelectedOptBgColor(target)
{
    target.options[target.seletedIndex].style.background = "green";
}
var upKeyCode = 38;
var downKeyCode = 40;
var enterKeyCode = 13;
var oInput = $("txtInput");
oInput.options = $("divSelect").getElementsByTagName("li");
oInput.seletedIndex = -1;
oInput.focus();
//oInput.onKeyPress{}
oInput.onkeyup = function(event){
    if (event == undefined)
        event = window.event;
    switch (event.keyCode)
    {
        case 37:
            clearSelectedOptBgColor(this);
            this.seletedIndex--;
            if (this.seletedIndex < 0)
                this.seletedIndex = this.options.length - 1;
 this.value = this.options[this.seletedIndex].innerHTML;
            setSelectedOptBgColor(this);
            
            break;
            case 38:
            clearSelectedOptBgColor(this);
            this.seletedIndex= this.seletedIndex-4;
            if (this.seletedIndex < 0)
                this.seletedIndex = this.options.length - 1;
 this.value = this.options[this.seletedIndex].innerHTML;
            setSelectedOptBgColor(this);
            
            break;
        case 39:
            clearSelectedOptBgColor(this);
            this.seletedIndex++;
            if (this.seletedIndex >= this.options.length)
                this.seletedIndex = 0;
            this.value = this.options[this.seletedIndex].innerHTML;
            setSelectedOptBgColor(this);
            break;
            case 40:
            clearSelectedOptBgColor(this);
            this.seletedIndex= this.seletedIndex+4;
            if (this</div></div>

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