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}