css+js 美化select下拉框三种方法

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';
}
}
}

body{background:#CFDFEF;font:12px/150% "Lucida Grande", Arial, Verdana, Helvetica, sans-serif;}

#uboxstyle .select_box{width:100px;height:24px;}

#macstyle .select_box{width:91px;height:24px;}

#tm2008style .select_box{width:102px;height:24px;}

#uboxstyle div.tag_select{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("ubox-select.gif") no-repeat 0 0;padding:0 10px;line-height:24px;}
#uboxstyle div.tag_select_hover{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("ubox-select.gif") no-repeat 0 -24px;padding:0 10px;line-height:24px;}
#uboxstyle div.tag_select_open{display:block;color:#79A2BD;width:80px;height:24px;background:transparent url("ubox-select.gif") no-repeat 0 -48px;padding:0 10px;line-height:24px;}

#uboxstyle ul.tag_options{position:absolute;padding:0;margin:0;list-style:none;background:transparent url("ubox-select.gif") no-repeat right bottom;width:100px;padding:0 0 5px;margin:0;}
#uboxstyle ul.tag_options li{background:transparent url("ubox-select.gif") repeat-y -100px 0;display:block;width:80px;padding:0 10px;height:24px;text-decoration:none;line-height:24px;color:#79A2BD;}

#uboxstyle ul.tag_options li.open_hover{background:transparent url("ubox-select.gif") no-repeat 0 -72px;color:#fff}
#uboxstyle ul.tag_options li.open_selected{background:transparent url("ubox-select.gif") no-repeat 0 -96px;color:#fff}

#macstyle div.tag_select{display:block;color:#000;width:71px;height:24px;background:transparent url("mac-select.gif") no-repeat 0 -24px;padding:0 10px;line-height:24px;}
#macstyle div.tag_select_hover{display:block;color:#000;width:71px;height:24px;background:transparent url("mac-select.gif") no-repeat 0 0;padding:0 10px;line-height:24px;}
#macstyle div.tag_select_open{display:block;color:#000;width:71px;height:24px;background:transparent url("mac-select.gif") no-repeat 0 -48px;padding:0 10px;line-height:24px;}

#macstyle ul.tag_options{position:absolute;margin:-4px 0 0;list-style:none;background:transparent url("mac-select.gif") no-repeat left bottom;width:100px;padding:0 0 5px;margin:0;width:71px;}
#macstyle ul.tag_options li{background:transparent url("mac-select.gif") repeat-y -91px 0;display:block;width:61px;padding:0 0 0 10px;height:24px;text-decoration:none;line-height:24px;color:#000;}

#macstyle ul.tag_options li.open_hover{background:transparent url("mac-select.gif") no-repeat -162px 0;color:#000}
#macstyle ul.tag_options li.open_selected{background:transparent url("mac-select.gif") no-repeat -162px -24px;color:#fff}

#tm2008style div.tag_select{display:block;color:#000;width:82px;height:22px;background:transparent url("tm2008-select.gif") no-repeat 0 0;padding:0 10px;line-height:22px;}
#tm2008style div.tag_select_hover{display:block;color:#000;width:82px;height:22px;background:transparent url("tm2008-select.gif") no-repeat 0 -22px;padding:0 10px;line-height:22px;}
#tm2008style div.tag_select_open{display:block;color:#000;width:82px;height:22px;background:transparent url("tm2008-select.gif") no-repeat 0 -44px;padding:0 10px;line-height:22px;}

#tm2008style ul.tag_options{position:absolute;margin:0;list-style:none;background:transparent url("tm2008-select.gif") no-repeat left bottom;width:100px;padding:0 0 1px;margin:0;width:80px;}
#tm2008style ul.tag_options li{background:transparent url("tm2008-select.gif") repeat-y -102px 0;display:block;width:61px;padding:0 10px;height:22px;text-decoration:none;line-height:22px;color:#000;}

#tm2008style ul.tag_options li.open_hover{background:transparent url("tm2008-select.gif") no-repeat 0 -88px;color:#000}
#tm2008style ul.tag_options li.open_selected{background:transparent url("tm2008-select.gif") no-repeat 0 -66px;color:#19555F}