Textbox to allow only special (#,',-)/ Alphanumeric characters using Javascript

 function EnableAlphaNumericSpecial(event) {
        // 65 - 90 = smaller case 'a',  32 - space, 48 - 58 - numeric - (0 - 9),  39 - ',35-#, 45- -

        var keyCode = event.charCode;              

        if (keyCode == undefined)
                keyCode = event.keyCode;

        if ((keyCode >= 65 && keyCode <= 90) || (keyCode >= 97 && keyCode <= 122) || (keyCode >= 48 && keyCode <= 57) || (keyCode == 32) || (keyCode == 39) || (keyCode == 45) || (keyCode == 35) || (keyCode == 0))
                event.returnValue = true;
            else {    //check if it is a IE browser or Firefox browser.
                if (window.event)
                    event.returnValue = false;
                else
                    event.preventDefault();
            }
    }