js验证数字

<%--        //验证数字control为验证的输入框
        function checkNum(control)
        {
        var reg=/^([0-9]*|[0-9]{1}\d*\.\d{1}?\d*)$/;
        var StyleCount=control.value;
        if(reg.test(StyleCount)==false)
        {
            document.getElementById("error").innerHTML="<table border=1 bordercolor=#FF0000 bgcolor=#F6F6F6 style=border-collapse:collapse><tr><td><font color=#FF0000>请输入数字！</font></td></tr></table>";
            control.focus();
            return false;
        }
        else
        document.getElementById("error").innerHTML="";
        return true;
        }--%>


        <input id="Button1" type="button" value="button" onclick="return checkNum(textboxt1)" />