javascript时钟

function showDate() { var dt; dt = new Date(); var y,m,d; y = dt.getYear(); m = dt.getMonth()+1; d = dt.getDay(); var h,mi,s; h = dt.getHours(); mi = dt.getMinutes(); if(mi<10)   mi = "0"+mi; s = dt.getSeconds(); if(s<10)  s = "0"+s; var today; today = y + "年" + m + "月" + d + "日" + h + ":" + mi + ":" + s; document.getElementById("time（你所获得的Id）").innerText = today; setTimeout("showDate()",1000); }