Jquery plugin for only numeric input

jquery.plugin.only-numeric-input.js

/* Only number input fields */
jQuery.fn.ForceNumericOnly =
function()
{
    return this.each(function()
    {
        $(this).keydown(function(e)
        {
            var key = e.charCode || e.keyCode || 0;
            // allow backspace, tab, delete, enter, arrows, numbers and keypad numbers ONLY
            // home, end, period, and numpad decimal
            return (
            key == 8 ||
            key == 9 ||
            key == 13 ||
            key == 46 ||
            key == 110 ||
            key == 190 ||
            (key >= 35 && key <= 40) ||
            (key >= 48 && key <= 57) ||
            (key >= 96 && key <= 105));
        });
    });
};
$(".onlynumeric").ForceNumericOnly();