js顯示時間

<div id="localtime" style=" font-size:12px; margin:2px 0 0 0;">
        <script type="text/javascript">
            function showLocale(objD) {
                var str, colorhead, colorfoot;
                var yy = objD.getYear();
                if (yy < 1900) yy = yy + 1900;
                var MM = objD.getMonth() + 1;
                if (MM < 10) MM = '0' + MM;
                var dd = objD.getDate();
                if (dd < 10) dd = '0' + dd;
                var hh = objD.getHours();
                if (hh < 10) hh = '0' + hh;
                var mm = objD.getMinutes();
                if (mm < 10) mm = '0' + mm;
                var ss = objD.getSeconds();
                if (ss < 10) ss = '0' + ss;
                var ww = objD.getDay();
                if (ww == 0) colorhead = "<font color=\"#FF0000\">";
                if (ww > 0 && ww < 6) colorhead = "<font color=\"#373737\">";
                if (ww == 6) colorhead = "<font color=\"#008000\">";
                if (ww == 0) ww = "星期日";
                if (ww == 1) ww = "星期一";
                if (ww == 2) ww = "星期二";
                if (ww == 3) ww = "星期三";
                if (ww == 4) ww = "星期四";
                if (ww == 5) ww = "星期五";
                if (ww == 6) ww = "星期六";
                colorfoot = "</font>"
                str = colorhead + yy + "-" + MM + "-" + dd + " " + hh + ":" + mm + ":" + ss + "  " + ww + colorfoot;
                return (str);
            }
            function tick() {
                var today;
                today = new Date();
                document.getElementById("localtime").innerHTML = showLocale(today);
                window.setTimeout("tick()", 1000);
            }
            tick();
        </script>