说明：代码取自网络！
<!DOCTYPE html> <html> <head> <meta 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;/*深蓝*/ font:12px/1.5 5fae8f6f96c59ed1; } #search, #search form, #search .box, #search .select, #search a{ background:url(img/search.jpg) no-repeat;/*不重复*/ } #search, #search .box, #search form{ height:34px; } #search{ position:relative;/*相对定位*/ width:350px; margin:10px auto; } #search .box{ background-position:right 0; } #search form{ background-repeat:repeat-x; background-position:0 -34px;/*上移*/ margin:0 20px 0 40px; } #search .select{ float:left; color:#fff; width:190px; height:22px; cursor:pointer; margin-top:4px; line-height:22px; padding-left:10px; background-position:0 -68px; } #search a{ float:left; width: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; width: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;/*黑色*/ } </style> <script> 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";//切换类值 (event || window.event).cancelBubble = true;//ie中event是window的对象 }; for (i = 0; i < aLi.length; i++) { aLi[i].onmouseover = function () { this.className = "hover"; }; aLi[i].onmouseout = function () { this.className = ""; }; 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>