<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>对象综合练习</title>
<style type="text/css">
body {
font: 14px "微软雅黑";
}
span {
padding: 5px;
}
table {
margin: 0 auto;
border: 3px solid cornflowerblue;
}
tr{
border: 1px solid #4169E1;
}
td#y,#m,#d,#day{
border:none;
}
</style>
</head>
<body>
<table>
<caption style="background-color:cornflowerblue;padding:5px 0;color: white;">x班期末成绩表</caption>
<thead>
<tr>
<td id="y"></td>
<td id="m"></td>
<td id="d"></td>
<td id="day"></td>
</tr>
</thead>
<tr>
<td>姓名</td>
<td>成绩</td>
<td>备注</td>
</tr>
<tr>
<td>小明</td>
<td>87</td>
</tr>
<tr>
<td>小花</td>
<td>81</td>
</tr>
<tr>
<td>小红</td>
<td>97</td>
</tr>
<tr>
<td>小天</td>
<td>76</td>
</tr>
<tr>
<td>小张</td>
<td>54</td>
<td>不及格</td>
</tr>
<tr>
<td>小小</td>
<td>94</td>
</tr>
<tr>
<td>小西</td>
<td>90</td>
</tr>
<tr>
<td>小舞</td>
<td>66</td>
</tr>
<tr>
<td>小迪</td>
<td>64</td>
</tr>
<tr>
<td>小曼</td>
<td>76</td>
</tr>
<tr>
<td>总分</td>
<td id="sum"></td>
</tr>
<tr>
<td>平均分</td>
<td id="b"></td>
</tr>
</table>
<script type="text/javascript">
var mydate = new Date();
// document.write(mydate);
document.getElementById(‘y‘).innerText = mydate.getFullYear() + ‘年‘;
var monthArr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12];
document.getElementById(‘m‘).innerText = monthArr[mydate.getMonth()] + ‘月‘; //这里注意，直接导出getMonth的值，会比实际月份少1，这是因为，月份是从1-12，而getMonth返回的值则是从0-11，就和星期的返回方法是一样的。所以解决方法也一样，利用返回的值，当做数组的下标调用，对应出正确的月份。用alert(mydate.getMonth())才发现了这个问题，进而解决掉。所以说alert是调试bug的必备良药。
// alert(mydate.getMonth());
document.getElementById(‘d‘).innerText = mydate.getDate() + ‘日‘; //获得日的方法
//星期
var dayArr = [‘星期日‘, ‘星期一‘, ‘星期二‘, ‘星期三‘, ‘星期四‘, ‘星期五‘, ‘星期六‘];
document.getElementById(‘day‘).innerHTML = dayArr[mydate.getDay()];
//成绩信息
var myArr = [[‘小明‘, 87],[‘小花‘, 81],[‘小红‘, 97],[‘小天‘, 76],[‘小张‘, 54],[‘小小‘, 94],[‘小西‘, 90],[‘小舞‘, 66],[‘小迪‘, 64],[‘小曼‘, 76]];
// alert(myArr[0]);
// alert(myArr[0][1]);
var sum = 0;
for(var i=0;i<myArr.length;i++){
sum += myArr[i][1];
// alert(myArr[i][1]);
// document.write(myArr[i][0]+‘<br />‘);
}
// document.write(sum);
document.getElementById(‘sum‘).innerText = sum;
var pjf = sum/myArr.length;
document.getElementById(‘b‘).innerHTML = Math.round(pjf);
</script>
</body>
</html>