jQuery+Bootstrap移动端支付宝金额充值表单页面网页特效

JavaScript代码部分

<script src="./js/jquery.min.js"></script>
<script src="./js/bootstrap.min.js"></script>
<script>
var $amountInput = $('[type="number"]');
var amount = '';
var $getId = $('[type="hidden"]');
var getparse=ParaMeter();
$getId.val(getparse.id);
$(".quick_amount p").off("click").on("click", function () {
  amount = $(this).text();
  if (!$(this).hasClass('active')) {
    $(this).addClass('active').siblings().removeClass('active');
    $amountInput.val(amount);
  } else {
    $(this).removeClass('active');
    $amountInput.val('');
  }
})
$amountInput.on('input propertychange', function () {
  if ($(this).val() > 5000) {
    $('#exampleModal').modal('show')
  }
  if($(this).val()!==$('.quick_amount p.active').text()){
    $('.quick_amount p').removeClass('active');
  }
})
$('#exampleModal').on('hidden.bs.modal', function (e) {
  $amountInput.val(5000);
})
function ParaMeter()
{
  var obj={};
  var arr=location.href.substring(location.href.lastIndexOf('?')+1).split("&");
  for(var i=0;i < arr.length;i++){
  var aa=arr[i].split("=");
  obj[aa[0]]=aa[1];
}
  return obj;
}
</script>