jQuery实现验证年龄简单思路

$("#age-form").submit(function(){

  var day = $("#day").val();

  var month = $("#month").val();

  var year = $("#year").val();

  var age = 18;

  var mydate = new Date();

  mydate.setFullYear(year, month-1, day);



  var currdate = new Date();

  currdate.setFullYear(currdate.getFullYear() - age);

  if ((currdate - mydate) < 0){

    alert("Sorry, only persons over the age of " + age + " may enter this site");

    return false;

  }

  return true;

});