<script type="text/javascript"> //加 $("body").on("click",".add",function(){ var number = $("#number").val(); number = parseInt(number) + 1; $("#number").val(number); }) //减 $("body").on("click",".minus",function(){ var number = $("#number").val(); if(number > 1){ number = parseInt(number) - 1; }else{ alert('商品数量不能少于1'); } $("#number").val(number); }) </script> <script type="text/javascript" src="__mobile__/js/jquery-1.7.js"></script>
<div class="summary-item is-number"> <div class="si-tit">数量</div> <div class="si-warp"> <div class="amount-warp"> <input class="text buy-num number" ectype="quantity" id="number" value="1" name="number" defaultnumber="1"> <div class="a-btn"> <a href="javascript:void(0);" class="add" ectype="btnAdd"><i class="iconfont icon-up"></i></a> <a href="javascript:void(0);" class="minus" ectype="btnReduce"><i class="iconfont icon-down"></i></a> <input type="hidden" name="perNumber" id="perNumber" ectype="perNumber" value="0"> <input type="hidden" name="perMinNumber" id="perMinNumber" ectype="perMinNumber" value="1"> <input name="cart_value" id="cart_value" value="" type="hidden" /> </div> <input name="confirm_type" id="confirm_type" type="hidden" value="3" /> </div> </div> </div>