$('.card-box').on('focus', function(e){
$(this).parent().addClass('focus-form-control');
});
$('.card-box').on('blur', function(e){
$(this).parent().removeClass('focus-form-control');
});
$('.card-box-1').on('keyup', function(e){
e.preventDefault();
var max_length = parseInt($(this).attr('maxLength'));
var _length = parseInt($(this).val().length);
if(_length >= max_length) {
$('.card-box-2').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
if(_length <= 0){
return;
}
});
$('.card-box-2').on('keyup', function(e){
e.preventDefault();
var max_length = parseInt($(this).attr('maxLength'));
var _length = parseInt($(this).val().length);
if(_length >= max_length) {
$('.card-box-3').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
if(_length <= 0){
$('.card-box-1').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
});
$('.card-box-3').on('keyup', function(e){
e.preventDefault();
var max_length = parseInt($(this).attr('maxLength'));
var _length = parseInt($(this).val().length);
if(_length >= max_length) {
$('.card-box-4').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
if(_length <= 0){
$('.card-box-2').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
});
$('.card-box-4').on('keyup', function(e){
e.preventDefault();
var max_length = parseInt($(this).attr('maxLength'));
var _length = parseInt($(this).val().length);
if(_length >= max_length) {
return;
}
if(_length <= 0){
$('.card-box-3').focus().removeAttr('readonly');
$(this).attr('readonly', 'readonly');
}
});
input[type="number"]::-webkit-outer-spin-button, input[type="number"]::-webkit-inner-spin-button {
-webkit-appearance: none; margin: 0;
}
input[type="number"] { -moz-appearance: textfield; }
.card-box {
width: 20%; display: inline-block; height: 100%; border: none;
}
.focus-form-control {
border-color: #66afe9; outline: 0;-webkit-box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.0/jquery.min.js"></script>
<div class="form-control" style="padding: 0; max-width: 300px; ">
<input class="card-box card-box-1" type="number" id="CreditCard_CardNumber1" required step="1" minlength="4" maxlength="4" pattern="[0-9]{4}" value="" placeholder="0000"
onClick="this.setSelectionRange(0, this.value.length)" oninput="this.value=this.value.slice(0,this.maxLength||'');this.value=(this.value < 1) ? ('') : this.value;"/>
<input class="card-box card-box-2" type="number" id="CreditCard_CardNumber2" readonly required step="1" minlength="4" maxlength="4" pattern="[0-9]{4}" value="" placeholder="0000"
onClick="this.setSelectionRange(0, this.value.length)" oninput="this.value=this.value.slice(0,this.maxLength||'');this.value=(this.value < 1) ? ('') : this.value;" />
<input class="card-box card-box-3" type="number" id="CreditCard_CardNumber3" readonly required step="1" minlength="4" maxlength="4" pattern="[0-9]{4}" value="" placeholder="0000"
onClick="this.setSelectionRange(0, this.value.length)" oninput="this.value=this.value.slice(0,this.maxLength||'');this.value=(this.value < 1) ? ('') : this.value;" />
<input class="card-box card-box-4" type="number" id="CreditCard_CardNumber4" readonly required step="1" minlength="4" maxlength="4" pattern="[0-9]{4}" value="" placeholder="0000"
onClick="this.setSelectionRange(0, this.value.length)" oninput="this.value=this.value.slice(0,this.maxLength||'');this.value=(this.value < 1) ? ('') : this.value;" />
</div>