执行javascript函数后，其余代码将被跳过

Question

当文档加载时，它执行checkseason()函数，然后忽略其余的代码。如果加载时没有checkseason()，代码会因某种原因正常运行，我需要在开头执行checkseason()以将验证规则应用于输入字段。

$.mask.definitions['~'] = '[+-]';
$.mask.definitions['x'] = '[0-9]';
$.mask.definitions['*'] = '[-A-Za-z0-9._\\\/?&=~]';

function checkseason(){
  d = document.getElementById("season").value;

  $('#second_form').validate({
    rules: {
      patch: {
        required: true,
        minlength: 4,
        maxlength: 4,
        remote: {
          url: "../checkpatch.php",
          type: "post"
        }
      }
    },
    messages: {
      patch: {
        required: "Please enter patch version.",
        remote: "Patch with this number already exists."
      }
    },

  });


  $('select[name="season"]').on('change', function () {
    if ($(this).val() == "newseasons") {
      $('input[name="patch"]').rules('add', {
        minlength: 4,
        maxlength: 4,
        messages: {
          minlength: "Please enter 3 numbers"
        }
      });
    } else if ($(this).val() == "oldseasons") {
      $('input[name="patch"]').rules('add', {
        minlength: 8,
        maxlength: 9,
        messages: {
          minlength: "Please enter 8 numbers"
        }
      });
    }
  });

  if(d==='newseasons'){
    $("#patch").mask("x.xx", {
      placeholder: ""
    });
  }
  else if(d==='oldseasons'){

    $("#patch").unmask();
    $("#patch").mask("?x.x.x.xxx", {
      placeholder: ""
    });
  }
}


$(document).ready(function(){
  checkseason();

  var config = {
    fillAll: true
  };

  document.forms["second_form"].oninput = function(e) {
    var champion = this["champion[]"];

    //Force into array
    if (champion[0] === undefined)
      champion = [this["champion[]"]];

    var reached = {
      valid: 0,
      unique: 0
    };

    var inputs = [].map.call(champion, function(n) {
      return n.value
    }).filter(function(n) {
      return n.length
    });

    var valid = [].every.call(champion, function(n, i) {
      n.setCustomValidity("");
      if (config.fillAll) return (reached.valid = i, champions.hasOwnProperty(n.value));
      else return n.value ? (
        reached.valid = i,
        champions.hasOwnProperty(n.value) > -1
        ) : true;
    });

    var unique = inputs.slice(0).sort().every(function(n, i, a) {
      reached.unique = inputs.lastIndexOf(n);
      return n != a[i - 1];
    });

    //Check for valid champions
    if (!valid) {
      champion[reached.valid].setCustomValidity("This is not a valid champion, please correct this field and resubmit.")
    }

    //Check for duplicates
    if (!unique) {
      champion[reached.unique].setCustomValidity("This champion has already been entered.")
    }

    this.checkValidity();
  };
});