基于javascript bootstrap实现生日日期联动选择

<div class="col-sm-9">     <label class="checkbox-inline">      <select node-type="birthday_year" name="birthday_y" id="birthday_y">      <option value=""></option>       </select><span>年</span>     </label>     <label class="checkbox-inline">      <select node-type="birthday_month" name="birthday_m" id="birthday_m">      <option value=""></option>       </select><span>月</span>     </label>     <label class="checkbox-inline">      <select node-type="birthday_month" name="birthday_d" id="birthday_d">      <option value=""></option>       </select><span>日</span>     </label>     <input type="hidden" name="birth" id="birth" value="2016/2/12">     <label class='checkbox-inline text-warning hidden' id="birth_error_info"><i class='fa fa-warning'>请输入完整生日</i></label>     </div>

//设置生日的转换和获取   var date=new Date(); var year=date.getFullYear(); for(var i=year;i>=1900;i--){ $("#birthday_y").append("<option value="+i+" label="+i+">"+i+"</option>"); }     $('#birthday_y').change(function(){ var birth_year=$('#birthday_y').val(); if(birth_year!=""){  var birth_month=$('#birthday_m').val();  if(birth_month!=""){  if(birth_month=="2"){   if((birth_year%4==0 && birth_year%100!=0) || (birth_year%400==0)){   $("#birthday_d").append("<option value=" + 29 + " label=" + 29 + ">" + 29 + "</option>");   }else{   $("#birthday_d option[value='29']").remove();   }  }  }else {  for (var i = 1; i <= 12; i++) {   $("#birthday_m").append("<option value=" + i + " label=" + i + ">" + i + "</option>");  }  } }else{  $("#birthday_m").html("<option value=''></option>");  $("#birthday_d").html("<option value=''></option>"); } checkBirthday(); }); $('#birthday_m').change(function(){ var birth_year=$('#birthday_y').val(); var birth_month=this.value; var birth_day=$('#birthday_d').val(); if(birth_month!=""){  switch (birth_month){  case "1":case "3":case "5":case "7":case "8":case "10":case "12":  if(birth_day=="") {   $("#birthday_d").empty();   $("#birthday_d").append("<option value='' ></option>");   for (var i = 1; i <= 31; i++) {   $("#birthday_d").append("<option value=" + i + " label=" + i + ">" + i + "</option>");   }  }else {   switch ($("#birthday_d option:last").attr("value")){   case "28":$("#birthday_d").append("<option value=" + 29 + " >" + 29 + "</option>");   case "29":$("#birthday_d").append("<option value=" + 30 + " >" + 30 + "</option>");    $("#birthday_d").append("<option value=" + 31 + " >" + 31 + "</option>");break;   case "30":$("#birthday_d").append("<option value=" + 31 + " >" + 31 + "</option>");    break;   default :break;    }  }  break;  case "4":case "6":case "9": case "11":  if(birth_day=="") {   $("#birthday_d").empty();   $("#birthday_d").append("<option value='' ></option>");   for (var i = 1; i <= 30; i++) {   $("#birthday_d").append("<option value=" + i + " label=" + i + ">" + i + "</option>");   }  }else{   switch ($("#birthday_d option:last").attr("value")){   case "28":$("#birthday_d").append("<option value=" + 29 + " >" + 29 + "</option>");   case "29":$("#birthday_d").append("<option value=" + 30 + " >" + 30 + "</option>");   case "31":$("#birthday_d option[value='31']").remove();    break;   default :break;    }  }  break;  case "2":   if(birth_day==""){   if((birth_year%4==0 && birth_year%100!=0) || (birth_year%400==0)){    for(var i=1;i<=29;i++){    $("#birthday_d").append("<option value="+i+" label="+i+">"+i+"</option>");    }   }else{    for(var i=1;i<=28;i++){    $("#birthday_d").append("<option value="+i+" label="+i+">"+i+"</option>");    }   }}else{   $("#birthday_d option[value='31']").remove();   $("#birthday_d option[value='30']").remove();   if((birth_year%4==0 && birth_year%100!=0) || (birth_year%400==0)){    }else{    $("#birthday_d option[value='29']").remove();   }   }   break;  default :break;  }   } checkBirthday(); });  $('#birthday_d').change(function() {  checkBirthday(); } ); $('#birthday_d').focus( function(){  if($('#birthday_m').val()==""){  $("#birthday_d").empty();  $("#birthday_d").append("<option value='' ></option>");  } } );  //根据后台提供的数据，填充用户的值 var birth_value=$('#birth').val(); if(birth_value!="") { var date1 = new Date(birth_value); var b_year=date1.getFullYear(); var b_month=date1.getMonth()+1; var b_day=date1.getDate(); $("#birthday_y").find("option[value='"+b_year+"']").attr("selected","selected"); if($('#birthday_y').val()!="") {  for (var i = 1; i <= 12; i++) {  $("#birthday_m").append("<option value=" + i + " label=" + i + ">" + i + "</option>");  } } $("#birthday_m").find("option[value='"+b_month+"']").attr("selected","selected"); switch (b_month){  case 1:case 3:case 5:case 7:case 8:case 10:case 12:  for (var i = 1; i <= 31; i++) {  $("#birthday_d").append("<option value=" + i + " label=" + i + ">" + i + "</option>");  }  break;  case 4:case 6:case 9: case 11:   $("#birthday_d").append("<option value='' ></option>");  for (var i = 1; i <= 30; i++) {  $("#birthday_d").append("<option value=" + i + " label=" + i + ">" + i + "</option>");  }  break;  case 2:  if((b_year%4==0 && b_year%100!=0) || (b_year%400==0)){   for(var i=1;i<=29;i++){   $("#birthday_d").append("<option value="+i+" label="+i+">"+i+"</option>");   }  }else{   for(var i=1;i<=28;i++){   $("#birthday_d").append("<option value="+i+" label="+i+">"+i+"</option>");   }  }  break;  default :break; } $("#birthday_d").find("option[value='"+b_day+"']").attr("selected","selected"); } //验证生日是否输入完整 function checkBirthday(){ var b_year= $('#birthday_y').val(); var b_month=$('#birthday_m').val(); var b_day=$('#birthday_d').val(); if(b_year!=""&&b_month!=""&&b_day!=""){  $('#birth').val(b_year+"-"+b_month+"-"+b_day);  $('#birth_error_info').addClass("hidden"); }else{  $('#birth').val("");  $('#birth_error_info').removeClass("hidden"); } }