// JavaScript Document
//自定义下拉菜单
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';
    }
  }
}