search

Home >Web Front-end >JS Tutorial >JS CSS realizes the beautified drop-down list box effect_javascript skills

JS CSS realizes the beautified drop-down list box effect_javascript skills

WBOY
WBOYOriginal
2016-05-16 15:45:481226browse

The example in this article describes the beautified drop-down list box effect achieved by JS CSS. Share it with everyone for your reference. The details are as follows:

A drop-down list beautified by JS CSS, the effect is very good, but the code is a bit too much. Friends who learn CSS can learn the method, and then make some changes by themselves to simplify the code.

The operation effect is as shown below:

The specific code is as follows: 

<!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=gb2312" />
<title>JS+CSS下拉列表</title>
<style type="text/css">
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("http://files.jb51.net/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("http://files.jb51.net/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("http://files.jb51.net/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("http://files.jb51.net/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("http://files.jb51.net/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("http://files.jb51.net/file_images/article/201508/2015811145849095.gif") no-repeat 0 -88px;color:#000}
#age_sel_2 ul.tag_options li.open_selected{background:transparent url("http://files.jb51.net/file_images/article/201508/2015811145849095.gif") no-repeat 0 -66px;color:#19555F}
</style>
<script>
var selects = document.getElementsByTagName('select');
var isIE = (document.all && window.ActiveXObject && !window.opera) &#63; true : false;
function $(id) {
 return document.getElementById(id);
}
function stopBubbling (ev) { 
 ev.stopPropagation();
}
function rSelects() {
 for (i=0;i<selects.length;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<selects[i].options.length;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<selects.length;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<selects.length;i++){ 
  $('select_info_' + selects[i].name).className = 'tag_select';
  $('options_' + selects[i].name).style.display = 'none';
 }
 }
}</script>
</head>
<body>
<div class="center">
<div id="age_sel_2">
 <select name="area_selet2" id="area_select2">
  <option value="请选择">请选择</option>
  <option value="ASP" >ASP</option>
  <option value="PHP" >PHP</option>
  <option value=".NET" >.NET</option>
  <option value="Csharp" >Csharp</option>
  <option value="Delphi" >Delphi</option>
  <option value="Java" >Java</option>
 </select>
</div>
</div>
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：High-performance JavaScript reflow and redraw (2)_javascript skillsNext article：High-performance JavaScript reflow and redraw (2)_javascript skills

Related articles

See more