模拟select控件，CSS下拉菜单

模拟select控件

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 \5fae\8f6f\96c5\9ed1;}

#search,#search form,#search .box,#search .select,#search a{background:url(http://www.codefans.net/jscss/demoimg/201206/search.jpg) no-repeat;}

#search,#search .box,#search form{height:34px;}

#search{position:relative;width: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;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;}

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";

};

};