var date = new Date();

var myYear = date.getFullYear();

var myMonth = date.getMonth() + 1;//注意月份是从0开始计算的

var myDay = date.getDate();//返回日期

var weeknew=new Array(7);

weeknew[0]="星期日";

document.write(weeknew[0]+"<br/>");

weeknew[1]="星期一";

weeknew[2]="星期二";

weeknew[3]="星期三";

weeknew[4]="星期四";

weeknew[5]="星期五";

weeknew[6]="星期六";

var myday = date.getDay();

document.write(myday+"<br/>");

document.write(myYear + "年" + myMonth + "月" + myDay + "日 " +weeknew[myday]);

var str = "小明:10;小花:10;小红:10;小天:10;小张:10;小小:10;小西:10;小伍:10;小迪:10;小曼:10";

var arr = new Array();

var str1 = str.split(";");

for (var i = 0; i < str1.length; i++) {

arr[i] = str1[i]

}

var mydate = new Date();

var weekday = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];

for (var j = 0; j < arr.length; j++) {

document.write(mydate.toLocaleDateString() + weekday[mydate.getDay()] + "&nbsp;&nbsp;&nbsp;" + mydate.getHours() +

"时" + mydate.getMinutes() + "分" + mydate.getSeconds() + "秒" + "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;" + arr[j] +

"<br/>");

}

var b = 0;

for (var k = 0; k < arr.length; k++) {

b += parseInt(arr[k].substr(-2));

}

document.write("总分是：" + b + "一共" + arr.length + "个学生" + "<br/>");

document.write("这个班级的平均分是：" + b / arr.length);

没有switch事件，所以出不来。还是去看一下别人做完的代码，看看自己的问题