<input class="is-invalid-input" data-bind="creditcardnum: ccNumber, css: { 'is-invalid-input': !ccNumber_isvalid().isValid }, hasFocus: ccNumber_isselected, event: { blur: hadFocusCcNumber }" data-field="ccNumber" id="ccno-textbox" maxlength="23" placeholder="1234567890 *" type="tel" value=""/>