Mobile Validation

 <script type="text/javascript">

    function isNumberKey(evt) {

        var charCode = (evt.which) ? evt.which : event.keyCode

        if (charCode != 46 && charCode > 31 && (charCode < 48 || charCode > 57))

            return false;

        return true;

    }

</script>

<input type="text" name="mobileno" id="mobileno" class="form-control" pattern="[789][0-9]{9}" maxlength="10" onkeypress="return isNumberKey(event)"  />

8630010048 - Right 

86300 - Wrong 

abc character not allow