本文實例講述了JS+CSS實現美化的下拉列表框效果。分享給大家供大家參考。具體如下：

一款經過JS+CSS美化的下拉列表，效果很不錯，但代碼有點偏多，學習CSS的朋友可以學習一下方法，然后自己變通一下，把代碼簡化一下。

運行效果如下圖所示：

具體代碼如下：

/p>

"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

JS+CSS下拉列表

body{

font-size:12px; margin:0

}

.center{ margin-left:auto; margin-right:auto; margin-top:200px; width:300px;}

#age_sel_2 div.tag_select{display:block;color:#000;width:62px;height:22px;background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat 0 0;padding:0 10px;line-height:22px;}

#age_sel_2 div.tag_select_hover{display:block;color:#000;width:62px;height:22px;background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat 0 -22px;padding:0 10px;line-height:22px;}

#age_sel_2 div.tag_select_open{display:block;color:#000;width:62px;height:22px;background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat 0 -44px;padding:0 10px;line-height:22px;}

#age_sel_2 ul.tag_options{position:absolute;margin:0;list-style:none;background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat left bottom;padding:0 0 1px;margin:0;width:60px;}

#age_sel_2 ul.tag_options li{background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") repeat-y -102px 0;display:block;width:61px;padding:0 10px;height:22px;text-decoration:none;line-height:22px;color:#000;}

#age_sel_2 ul.tag_options li.open_hover{background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat 0 -88px;color:#000}

#age_sel_2 ul.tag_options li.open_selected{background:transparent url("//img.jbzj.com/file_images/article/201508/2015811145849095.gif") no-repeat 0 -66px;color:#19555F}

var selects = document.getElementsByTagName('select');

var isIE = (document.all && window.ActiveXObject && !window.opera) ? true : false;

function $(id) {

return document.getElementById(id);

}

function stopBubbling (ev) {

ev.stopPropagation();

}

function rSelects() {

for (i=0;i

selects[i].style.display = 'none';

select_tag = document.createElement('div');

select_tag.id = 'select_' + selects[i].name;

select_tag.className = 'select_box';

selects[i].parentNode.insertBefore(select_tag,selects[i]);

select_info = document.createElement('div');

select_info.id = 'select_info_' + selects[i].name;

select_info.className='tag_select';

select_info.style.cursor='pointer';

select_tag.appendChild(select_info);

select_ul = document.createElement('ul');

select_ul.id = 'options_' + selects[i].name;

select_ul.className = 'tag_options';

select_ul.style.position='absolute';

select_ul.style.display='none';

select_ul.style.zIndex='999';

select_tag.appendChild(select_ul);

rOptions(i,selects[i].name);

mouseSelects(selects[i].name);

if (isIE){

selects[i].onclick = new Function("clickLabels3('"+selects[i].name+"');window.event.cancelBubble = true;");

}

else if(!isIE){

selects[i].onclick = new Function("clickLabels3('"+selects[i].name+"')");

selects[i].addEventListener("click", stopBubbling, false);

}

}

}

function rOptions(i, name) {

var options = selects[i].getElementsByTagName('option');

var options_ul = 'options_' + name;

for (n=0;n

option_li = document.createElement('li');

option_li.style.cursor='pointer';

option_li.className='open';

$(options_ul).appendChild(option_li);

option_text = document.createTextNode(selects[i].options[n].text);

option_li.appendChild(option_text);

option_selected = selects[i].options[n].selected;

if(option_selected){

option_li.className='open_selected';

option_li.id='selected_' + name;

$('select_info_' + name).appendChild(document.createTextNode(option_li.innerHTML));

}

option_li.onmouseover = function(){ this.className='open_hover';}

option_li.onmouseout = function(){

if(this.id=='selected_' + name){

this.className='open_selected';

}

else {

this.className='open';

}

}

option_li.onclick = new Function("clickOptions("+i+","+n+",'"+selects[i].name+"')");

}

}

function mouseSelects(name){

var sincn = 'select_info_' + name;

$(sincn).onmouseover = function(){ if(this.className=='tag_select') this.className='tag_select_hover'; }

$(sincn).onmouseout = function(){ if(this.className=='tag_select_hover') this.className='tag_select'; }

if (isIE){

$(sincn).onclick = new Function("clickSelects('"+name+"');window.event.cancelBubble = true;");

}

else if(!isIE){

$(sincn).onclick = new Function("clickSelects('"+name+"');");

$('select_info_' +name).addEventListener("click", stopBubbling, false);

}

}

function clickSelects(name){

var sincn = 'select_info_' + name;

var sinul = 'options_' + name;

for (i=0;i

if(selects[i].name == name){

if( $(sincn).className =='tag_select_hover'){

$(sincn).className ='tag_select_open';

$(sinul).style.display = '';

}

else if( $(sincn).className =='tag_select_open'){

$(sincn).className = 'tag_select_hover';

$(sinul).style.display = 'none';

}

}

else{

$('select_info_' + selects[i].name).className = 'tag_select';

$('options_' + selects[i].name).style.display = 'none';

}

}

}

function clickOptions(i, n, name){

var li = $('options_' + name).getElementsByTagName('li');

$('selected_' + name).className='open';

$('selected_' + name).id='';

li[n].id='selected_' + name;

li[n].className='open_hover';

$('select_' + name).removeChild($('select_info_' + name));

select_info = document.createElement('div');

select_info.id = 'select_info_' + name;

select_info.className='tag_select';

select_info.style.cursor='pointer';

$('options_' + name).parentNode.insertBefore(select_info,$('options_' + name));

mouseSelects(name);

$('select_info_' + name).appendChild(document.createTextNode(li[n].innerHTML));

$( 'options_' + name ).style.display = 'none' ;

$( 'select_info_' + name ).className = 'tag_select';

selects[i].options[n].selected = 'selected';

}

window.onload = function(e) {

bodyclick = document.getElementsByTagName('body').item(0);

rSelects();

bodyclick.onclick = function(){

for (i=0;i

$('select_info_' + selects[i].name).className = 'tag_select';

$('options_' + selects[i].name).style.display = 'none';

}

}

}

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