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=" 510px; border: 1px grey solid; border-right: 1px gray; padding-top: 1px;" >
    </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 ).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]));

}