each jquery

 ???????<div class="first"> ???????????<span>投保人数:</span> ???????????<input type="text" id="people_num" placeholder="预计投保人数" value="1">  人 ???????</div> ???????<div class="first" style="height: auto;"> ???????????<span class="span2">投保方案:</span> ???????????<div class="button_main"> ???????????????????????????????????????????????????????<div class="button" data-price="1000.55">方案一</div> ???????????????????????????????????????<div class="button" data-price="2000">方案二</div> ???????????????????????????????????????<div class="button" data-price="3000">方案三</div> ???????????????????????????????????????????????</div> ???????</div> ???????<div class="bottom_button" id="to_calculate"> ???????????立即计算 ???????</div>

//计算价格function calculation_price(){ ???var people_num = parseInt($(‘#people_num‘).val()); ???if(people_num < 0){ ???????console.log("人数错误"); ???????return false; ???} ???if (!$(‘.button_main div‘).hasClass(‘button_selected‘)){ ???????$(‘.button_main .button:first‘).addClass(‘button_selected‘); ???} ???$(‘.button‘).each(function(index){ ???????var _this = $(this); ???????var _select_price = parseFloat(_this.data(‘price‘)); ???????if(_this.hasClass(‘button_selected‘)){ ???????????var _select_price = parseFloat(_this.data(‘price‘)); ???????????var total_fee = _select_price * people_num; ???????????$(‘#total_fee‘).html(total_fee + ‘元‘); ???????} ???});}// $(document).on(‘click‘,‘#to_calculate‘,function () {// ????$(‘.calculation_result‘).fadeIn();// });//点击切换方案$(document).on(‘click‘,‘.button‘,function () { ???if($(‘.button‘).has(‘button_selected‘)){ ???????$(‘.button‘).removeClass(‘button_selected‘); ???} ???$(this).addClass(‘button_selected‘); ???calculation_price();});//变换投保人数$(document).on(‘change‘,‘#people_num‘,function(){ ???var people_num = $(‘#people_num‘).val(); ???console.log(people_num); ???if(!(/(^[1-9]\d*$)/.test(people_num))){ ???????alert("投保人数仅可为正整数"); ???????$(‘#people_num‘).val(‘1‘); ???????return false; ???} ???calculation_price();});