从缴费结算进入支付页，支付金额不可低于补差值

html/payment/js/payment.js

@@ -19,6 +19,7 @@ var loading = dialog({
			code:"",
			cardlenght:0,
			ischangeCard:false,
			_payMoney:"",
		},
		mounted: function() {
			var vm = this
@@ -101,6 +102,7 @@ var loading = dialog({
			        	}			        	
						if(Request.repayAmout){   //从缴费结算进入
							vm.payMoney=parseFloat(vm.repayAmout-vm.surplusMoney).toFixed(2)
							vm._payMoney=vm.payMoney
						}
			        }else{
				 	  loading.close();
@@ -111,13 +113,22 @@ var loading = dialog({
			//去支付
			toPayment:function(){
				var vm=this
				loading.showModal();
				if(vm.payMoney&&vm.payMoney>0){					
					if(judgeWxVersion()){
						vm.getWeixinSign()
					}
				if(vm.payMoney&&vm.payMoney>0){	
					if(Request.repayAmout&&vm._payMoney>vm.payMoney){   //从缴费结算进入，若支付金额少于预付则弹框提示
						dialog({
							content: "金额低于补差费用"+vm._payMoney+"元,请修改后支付。",
							okValue: '好的',
							ok: function() {
								vm.payMoney=vm._payMoney
							},
						}).showModal()
					}else{						
						loading.showModal();
						if(judgeWxVersion()){
							vm.getWeixinSign()
						}
					}					
				}else{
				 	 loading.close();
					 dialog({contentType:'tipsbox',bottom:true, skin:'bk-popup' , content:'请输入正确的充值金额'}).show();
				}
			},