(function( $ ){
    $.fn.maskinteger = function(){
        $(this).keypress(function(e){
                var whichCode = (window.Event) ? e.which : e.keyCode;
                if((whichCode > 47 && whichCode < 58) || whichCode == 8 || whichCode == 0){
                    return true;
                }else{
                    return false;
                }
        });
    }
})(jQuery);