js设置变形select选项（thymeleaf）

function operateIpList(oper){
		if(oper == "add"){
			var swords = $.trim($("#allowIPs").val());
			if(swords == ""){
				showInfo("请输入IP。", function(){$("#allowIPs").focus();});
				return false;
			}
			if(swords.indexOf(";") > -1){
				showInfo("名单信息不能包含 ; 号。", function(){$("#allowIPs").focus();});
				return false;
			}
			var swordsArray = ";"+$.map($("#allowIPsList option"),function(sele){return sele.text}).join(";")+";";
			if(swordsArray.indexOf(";"+swords+";") > -1){
				showInfo("该IP已存在。", function(){$("#allowIPs").focus();});
				return false;
			}
			$("#allowIPsList").append("<option value='nothing'>"+swords+"</option>");
			$("#allowIPs").val(""); 
		}else if(oper == "edit"){
			var s=$("#allowIPsList").find("option:selected").text();//选中的文本
			/*var v=$("#allowIPsList").find("option:selected").val();*/	
			var indexs=$("#allowIPsList ").get(0).selectedIndex;//选中的索引
		
			$("#allowIPsList option:selected").remove();
			var temp=window.prompt("编辑", s);
			if(temp==""){
				showInfo("ip不能为空。", function(){$("#allowIPs").focus();});
			}else{
				temp=temp.trim();
				var patrn = /^(?:(?:2[0-4][0-9]\.)|(?:25[0-5]\.)|(?:1[0-9][0-9]\.)|(?:[1-9][0-9]\.)|(?:[0-9]\.)){3}(?:(?:2[0-5][0-5])|(?:25[0-5])|(?:1[0-9][0-9])|(?:[1-9][0-9])|(?:[0-9]))$/;
			    if (!patrn.exec(temp)) {
			    	showInfo("请输入正确格式的ip。", function(){
			    		$("#allowIPsList").append("<option value='nothing'>"+s+"</option>");
						$("#allowIPs").val("");
			    		$("#allowIPs").focus();
			    	});
					return false;
			    }
				var swordsArray = ";"+$.map($("#allowIPsList option"),function(sele){return sele.text}).join(";")+";";
				if(swordsArray.indexOf(";"+temp+";") > -1){
					showInfo("该IP已存在。", function(){$("#allowIPs").focus();});
					return false;
				}
				$("#allowIPsList").append("<option value='nothing'>"+temp+"</option>");
				$("#allowIPs").val("");
			}
			
			
		}else if(oper == "del"){
			$("#allowIPsList option:selected").remove();
		}else if(oper == "empty"){
			$("#allowIPsList").empty();
		}
	}
           

页面：

<div class="form-group">
 <label class="col-sm-2 control-label no-padding-right"> 可访问IP管理 </label>
 <input type="text" id="allowIPs"  placeholder="请输入正确IP"  class="col-xs-10 col-sm-6" style="margin-left: 12px;"  />
 <button type="button"  class="btnw btn-info" id="addIps" style="margin-left: 10px;">添加IP</button>
 <small name ="iptext" style="font-size: 12px;color: #999;margin-left: 10px;"></small>
 <div class="col-sm-8" style="margin-top: 3px;">
     <label for="allowIPsList">IP列表</label>
     <input type="hidden" id="dataallowIPs" name="sys_system_allowIPsList" th:value="${allowIPsList}"/>
     <select class="form-control" id="allowIPsList" name="allowIPsList" multiple="multiple" size="5"></select>
     <div style="margin: 10px 0 0 0;">
		<button type="button"  id="editallowIPsBtn" class="btnw btn-info">编辑选中IP</button>
		<button type="button"  id="delallowIPsBtn" class="btnw btn-info" style="margin-left: 10px;">删除选中IP</button>
		<button type="button"  id="emptyallowIPsBtn" class="btnw btn-info" style="margin-left: 10px;">清空所有IP</button>
     </div>
 </div>
</div>
           

效果：