<!DOCTYPE HTML><html ><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>系好安全带,准备启航</title><script type="text/javascript"> //通过javascript的日期对象来得到当前的日期,并输出。 var date1=new Date(); var myyear=date1.getFullYear(); var mymonth=date1.getMonth(); var myday=date1.getDay(); var weekday=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]; document.write(myyear+"年"+mymonth+"月"+myday+"日"+" "+weekday[myday]); //成绩是一长窜的字符串不好处理,找规律后分割放到数组里更好操作哦 var scoreStr = [ ["小明","87"], ["小花","81"], ["小红","97"], ["小天","76"], ["小张","74"], ["小小","94"], ["小西","90"], ["小伍","76"], ["小迪","64"], ["小曼","76"] ] //从数组中将成绩撮出来,然后求和取整,并输出。 var sum=0; for(var a=0;a<scoreStr.length;a++){ sum=sum+parseInt(scoreStr[a][1]); } var av=sum/(scoreStr.length); document.write("--"+"班级平均分为:"+Math.floor(av));</script></head><body></body></html>