validate_input_number('.5int2dec');
validate_input_number('.9int0dec');

function validate_input_number(selector){
    $(selector).on('focus',function(){
        $(this).attr("last_value", $(this).val());
        $(this).keyup( function (e) {
            var max_dec = selector.split("int")[1].split("dec")[0];
            var max_int = selector.split("int")[0].replace(".", "");
            var keys = [8, 9, 16, 17, 18, 19, 20, 27, 33, 34, 35, 36, 37, 38, 39, 40, 45, 46, 144, 145];
            var tecla = e.keyCode;
            if($.inArray(tecla, keys) == -1 && (tecla < 112 || tecla > 123)) {
                var splited = $(this).val().split(".");
                if (splited[0].length > max_int || (splited[1] != undefined && splited[1].length > max_dec) || ((tecla < 48 || tecla > 57) && (tecla < 96 || tecla > 105 ) && tecla != 110 && tecla != 190) || ($(this).val().split(".").length == 3 && (tecla == 110 || tecla == 190))){
                    $(this).val($(this).attr("last_value"));
                    e.preventDefault();
                    e.stopPropagation();
                }else{
                    $(this).attr("last_value", $(this).val());
                }
            }else{
                $(this).attr("last_value", $(this).val());
            }
        });
    });
}