电脑方面的作业 跪求

插入下面代码就可以了
＜html＞
＜script＞
var days=["星期天","星期一","星期二","星期三","星期四","星期五","星期六"];
function goTime(){
var time = new Date();
var year = time.getFullYear();
var month = time.getMonth()+1;//返回0-11,所以+1
var date = time.getDate();
var day = time.getDay();//返回0-6
var hour = time.getHours();
var minute = time.getMinutes();
var second = time.getSeconds();
var str = "现在是:"+year+"年"+month+"月"+date+"日"+days[day];
str += hour+"点"+minute+"分"+second+"秒";
window.clock.innerHTML = str;
}
window.onload=function(){
window.clock=document.getElementById("clock");
window.setInterval("goTime()",1000);
}
＜/script＞

＜body＞
＜span id="clock"＞＜span＞
＜/body＞
＜/html＞

这得写程序