模拟select控件&&显示单击的坐标&&用户按下键盘，显示keyCode

<!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>模拟select控件</title>
<style>
html,body{height:100%;overflow:hidden;}
body,div,form,h2,ul,li{margin:0;padding:0;}
ul{list-style-type:none;}
body{background:#23384e;font:12px/1.5 5fae8f6f96c59ed1;}
#search,#search form,#search .box,#search .select,#search a{background:url(img/search.jpg) no-repeat;}
#search,#search .box,#search form{height:34px;}
#search{position:relative;350px;margin:10px auto;}
#search .box{background-position:right 0;}
#search form{background-repeat:repeat-x;background-position:0 -34px;margin:0 20px 0 40px;}
#search .select{float:left;color:#fff;190px;height:22px;cursor:pointer;margin-top:4px;line-height:22px;padding-left:10px;background-position:0 -68px;}
#search a{float:left;80px;height:24px;color:#333;letter-spacing:4px;line-height:22px;text-align:center;text-decoration:none;background-position:0 -90px;margin:4px 0 0 10px;}
#search a:hover{color:#f60;background-position:-80px -90px;}
#search .sub{position:absolute;top:26px;left:40px;color:#fff;198px;background:#2b2b2b;border:1px solid #fff;display:none;}
#search .sub li{height:25px;line-height:24px;cursor:pointer;padding-left:10px;margin-bottom:-1px;border-bottom:1px dotted #fff;}
#search .sub li.hover{background:#8b8b8b;}
</style>
<script type="text/javascript">
window.onload = function ()
{
    var oSelect = document.getElementsByTagName("span")[0];
    var oSub = document.getElementsByTagName("ul")[0];
    var aLi = oSub.getElementsByTagName("li");
    var i = 0;
    
    oSelect.onclick = function (event)
    {
        var style = oSub.style;
        style.display = style.display == "block" ? "none" : "block";
        //阻止事件冒泡
        (event || window.event).cancelBubble = true
    };
    
    for (i = 0; i < aLi.length; i++)
    {
        //鼠标划过
        aLi[i].onmouseover = function ()
        {
            this.className = "hover"
        };
        //鼠标离开
        aLi[i].onmouseout = function ()
        {
            this.className = "";
        };
        //鼠标点击
        aLi[i].onclick = function ()
        {
            oSelect.innerHTML = this.innerHTML    
        }
    }
    
    document.onclick = function ()
    {
        oSub.style.display = "none";    
    };
};
</script>
</head>
<body>
<div id="search">
    <div class="box">
        <form>
            <span class="select">请选择游戏名称</span>        
            <a href="javascript:;">搜索</a>
        </form>
    </div>
    <ul class="sub">
        <li>地下城与勇士</li>
        <li>魔兽世界（国服）</li>
        <li>魔兽世界（台服）</li>
        <li>热血江湖</li>
        <li>神鬼传奇</li>
        <li>大话西游II</li>
        <li>QQ幻想世界</li>
    </ul>
</div>
</body>
</html>

显示单击的坐标

<!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>显示单击的坐标</title>
<style>
pre{color:green;padding:10px 15px;background:#f0f0f0;border:1px dotted #333;font:12px/1.5 Courier New;}
span{color:#999;}
</style>
<script type="text/javascript">
document.onclick = function (event)
{
    var event = event || window.event;    
    alert("坐标：[" + event.clientX + ", " + event.clientY + "]")
}
</script>
</head>
<body>
<pre>
&lt;script type="text/javascript"&gt;
    var event = event || window.event;
    alert("坐标：[" + event.clientX + ", " + event.clientY + "]")
&lt;/script&gt;
</pre>
</body>
</html>

用户按下键盘，显示keyCode

<!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>用户按下键盘，显示keyCode</title>
<style>
body{
    text-align:center;
    font:30px/1.5 5fae8f6f96c59ed1, arial;    
}
pre{color:green;padding:10px 15px;background:#f0f0f0;border:1px dotted #333;font:12px/1.5 Courier New;text-align:left;}
span{color:#999;}
</style>
<script type="text/javascript">
window.onload = function ()
{
    var oP = document.getElementsByTagName("p")[0];    
    document.onkeydown = function (event)
    {
        var event = event || window.event;
        oP.innerHTML = event.keyCode;
        return false
    }
}
</script>
</head>
<body>
<pre>
&lt;script type="text/javascript"&gt;
window.onload = function ()
{
    var oP = document.getElementsByTagName("p")[0];    
    document.onkeydown = function (event)
    {
        var event = event || window.event;
        oP.innerHTML = event.keyCode;
        return false
    }
}
&lt;/script&gt;
</pre>
<p>这里将显示您按下键的 keyCode</p>
</body>
</html>

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原文地址：https://www.cnblogs.com/mayufo/p/4475020.html