JS+CSS实现美化的下拉列表框效果

发布于 2017-06-28 11:05:53 | 153 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的Javascript教程，程序狗速度看过来！

JavaScript客户端脚本语言

Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。

这篇文章主要介绍了JS+CSS实现美化的下拉列表框效果,涉及javascript针对下拉列表框样式的相关操作技巧,非常美观大方,需要的朋友可以参考下

本文实例讲述了JS+CSS实现美化的下拉列表框效果。分享给大家供大家参考。具体如下：

一款经过JS+CSS美化的下拉列表，效果很不错，但代码有点偏多，学习CSS的朋友可以学习一下方法，然后自己变通一下，把代码简化一下。

运行效果如下图所示：

具体代码如下：


<!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.phperz.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("http://files.phperz.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("http://files.phperz.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("http://files.phperz.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("http://files.phperz.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("http://files.phperz.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("http://files.phperz.com/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) ? 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>

希望本文所述对大家的javascript程序设计有所帮助。

JS+CSS实现美化的下拉列表框效果

JavaScript客户端脚本语言

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