复选框和下拉框js如何操作合格复选框或下拉框中元素

<div style="width: 510px; border: 1px grey solid; border-right: 1px gray; padding-top: 1px;" id="heddendiv">

    <div>
        <ul id="addressul" class="ul_s">
        </ul>
        <div style="color: #ccc; position: absolute;padding-top:1px;padding-left:5px" id="textDiv1" onclick="document.getElementById('serach').focus();">

        </div>
        <input type="text" name="serach" id="serach" class="inputs" style="width: 500px;padding:2px;display:inline;" onblur="if(this.value==''&&document.getElementById('addressul').childNodes.length==0)document.getElementById('textDiv1').style.display='inline';" onfocus="document.getElementById('textDiv1').style.display='none'">
    </div></div>

js:

//添加选中的关键字
function addLi(name,id,type,typeName){

    var addUl =jQuery("#addressul");
    var addUlLi =jQuery("#addressul li");

    if(addUl && addUlLi.length<5){
        superType = type;
        var textWidth = jQuery("#serach").css("width");

        if(name.length>15){
            name=name.substring(0,15);
        }
        for(i=0;i<addUlLi.length;i++){
            var tmpLi = addUlLi.eq(i);

            if(tmpLi.attr("id")=="li_"+id){
                alert(name+" 已选择，请勿重复选择！");
                return;
            }
        }
        addUl.append("<li id=\"li_"+id+"\" name="+name+" value="+id+">"+name+"<img src=\"/images/section/tp.gif\"></li>");

        jQuery("#li_"+id+" img").unbind().click(function(){removeLI("li_"+id)});
        var liWidth = jQuery("#li_"+id).css("width");
        var lastWidth = parseInt(textWidth)-parseInt(liWidth)-4;
        jQuery("#serach").css("width",lastWidth);
        jQuery("#serach").focus();
    }else{
        alert("接收人最多不得超过5人！");
        jQuery("#serach").focus();
    }
}
后台：

String otherPerson = data.getRequest().getParameter("otherPerson");//myy

if(otherPerson!=null){
   String others[]=otherPerson.split(",");
   for(int i=0;i<others.length;i++){
      if(others[i]!=null&&!"".equals(others[i])){
         tousers.add(others[i]);
      }
   }

service.sendMsg(msg, tousers.toArray(new String[0]));

}