Numeric characters validation in TextBox using JavaScript

here is my code . this is only for integer, so only integer is valid. Let say I want to make it valid for values such as 1.5, 1.0, 0.5. I think that bold part should we change.It is any possible solution?

 $(document).ready(function () {
        $('input[numeric]').keyup(function () {
            var d = $(this).attr('numeric');
            var val = $(this).val();
            var orignalValue = val;
            val = val.replace<strong>(/([^0-9].*)/g, "");</strong>
            var msg = "Only Integer Values allowed.";
            if (val != '') {
                orignalValue = orignalValue.replace(/(^[0-9]*$)/g, "")              
                $(this).val(orignalValue);
                $.fx.speeds._default = 1000;
                $(function () {
                    $("#dialog").dialog
                    ({
                        autoOpen: true,
                        show: "blind",
                        hide: "explode"
                    }); 
                });
            } 
        });
    });