js显示当前时间和日期

先来看一下效果：

<div class="time">您好，今天是： <span id=localtime></span> <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=\"#ffffff\">";if ( ww > 0 && ww < 6 ) colorhead="<font color=\"#ffffff\">";if ( ww==6 ) colorhead="<font color=\"#ffffff\">";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></div>