Only Number In Oracle Apex Test Field

$(".allow-decimal").keypress(function (e) {
    if(e.which == 46){
        if($(this).val().indexOf('.') != -1) {
            return false;
        }
    }
    if (e.which != 8 && e.which != 0 && e.which != 46 && (e.which < 48 || e.which > 57)) {
        return false;
    }
});


allow-decimal

onfocusout="this.value=Number(this.value).toFixed(4)"