今天页面上一个添加列内容时，要对选择内容与之前已有选项内容作对比，防止用户重复选择内容
![[jquery]添加行内容后根据下拉菜单选择内容对比之前已有选项，若有重置再提示](https://img.zhankr.net/qts34vxgvcg275702.png)
页面HTML代码
<ul class="list-group xj-list-NObor xj-configuration-list">
<li class="list-group-item clearfix">
<div class="col-lg-1 xj-label-height xj-paddingRight0">选择字段：
</div>
<div class="col-lg-2 xj-paddingLeft0">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">请假人</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div>
<div class="col-lg-1 xj-label-height text-right xj-paddingRight0">选择搜索控件类型：
</div>
<div class="col-lg-2">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">关键字精确搜索</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div> <div class="col-lg-1 pull-right text-right"><a class="btn btn-default xj-btn xj-btn-normal soaDelete" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a>
</div>
</li>
<li class="list-group-item clearfix">
<div class="col-lg-1 xj-label-height xj-paddingRight0">选择字段：
</div>
<div class="col-lg-2 xj-paddingLeft0">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">请假原因</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div>
<div class="col-lg-1 xj-label-height text-right xj-paddingRight0">选择搜索控件类型：
</div>
<div class="col-lg-2">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">关键字模糊搜索</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div> <div class="col-lg-1 pull-right text-right"><a class="btn btn-default xj-btn xj-btn-normal soaDelete" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a>
</div>
</li> <li class="list-group-item clearfix">
<div class="col-lg-1 xj-label-height xj-paddingRight0">选择字段：
</div>
<div class="col-lg-2 xj-paddingLeft0">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">审批状态</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div>
<div class="col-lg-1 xj-label-height text-right xj-paddingRight0">选择搜索控件类型：
</div>
<div class="col-lg-2">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">字段内容筛选</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div>
<div class="col-lg-1 xj-paddingLeft0"> <a class="btn-select fl btn-select-n" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">日期</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val="">
<option value=""></option>
<option value="4">票据类型1</option>
<option value="5">票据类型2</option>
</select>
</a> </div>
<div class="col-lg-1 pull-right text-right"><a class="btn btn-default xj-btn xj-btn-normal soaDelete" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a>
</div>
</li>
<li class="list-group-item clearfix">
<div class="col-lg-1 xj-label-height xj-paddingRight0">选择字段：
</div>
<div class="col-lg-2 xj-paddingLeft0">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">提交时间</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div>
<div class="col-lg-1 xj-label-height text-right xj-paddingRight0">选择搜索控件类型：
</div>
<div class="col-lg-2">
<a class="btn-select fl" id="btn_select02">
<div class="btn-select-div clearfix">
<span class="cur-select">时间段搜索</span>
<span class="cur-select-icon"><img src="data:images/ico-arrow.png" width="10" height="5"></span>
</div>
<select name="bill_type_id" id="bill_type_id" data-val=""><option value=""></option><option value="4">票据类型1</option><option value="5">票据类型2</option></select>
</a>
</div> <div class="col-lg-1 pull-right text-right"><a class="btn btn-default xj-btn xj-btn-normal soaDelete" href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >删除</a>
</div>
</li>
<li class="list-group-item clearfix">
<div class="col-lg-2 pull-right text-right">
<button type="button" id="addList" class="btn btn-primary xj-btn xj-btn-primary xj-btn-primary-lg">添加搜索项</button>
</div>
</li>
</ul>
添加、删除与下拉菜单美化的JS代码
//下拉菜单功能
"selectDefault":function(){
$("select").each(function(i){
var text = $(this).find("option:selected").text();
var p = $(this).parent();
var tag = p.get(0).tagName;
tag = tag.toUpperCase();
if(tag == "DIV")
$(this).parent().prev().find(".cur-select").text(text);
else
$(this).prev().find(".cur-select").text(text);
})
},
"selectChange":function(){
$('#wrapper').on('change', 'select', function () {
var text = $(this).find("option:selected").text();
var p = $(this).parent();
var tag = p.get(0).tagName;
tag = tag.toUpperCase();
if(tag == "DIV")
$(this).parent().prev().find(".cur-select").text(text);
else
$(this).prev().find(".cur-select").text(text);
});
}//添加删除行
$("#addList").click(function(){
var str = $("ul.xj-configuration-list li:first");
$(".xj-configuration-list li:first").before(str);
});
$(".soaDelete").click(function(){
$(this).parents("li").remove();
});
对比判断JS代码
$("select").change(function(){
var toSel = $(this).parents("a.btn-select").find("span.cur-select").text();
$(this).parents("li.list-group-item").siblings("li.list-group-item").each(function(){
if(toSel == $(this).find("span.cur-select").text() ){
$(".abandon_query_notice").html('该字段已经存在');
$("#modal_abandon").modal();
}
});
});
