html求平均值的函数,计算平均值？在动态html表

calcAverage = function() {

var tbl = document.getElementById('myTable');

for(var i= 0; i

}

}

// var tableRow = document.getElementById();

//var tableCells = tableRow.getElementsByTagName("td");

// var assignmentOne = tableCells[2].innerText;

// var averageGrade = tableCells[2].innerText;

//tableCells[3].innerHTML = averageGrade;

//if (averageGrade < 40) {

// tableCells[3].style.backgroundColor = "red";

// tableCells[3].style.color = "white";

//}

//}//

AddRow = function() {

var tbl = document.getElementById('myTable'); // table reference

row = tbl.insertRow(tbl.rows.length); // append table row

var i;

// insert table cells to the new row

for (i = 0; i < tbl.rows[0].cells.length; i++) {

var createCell =row.insertCell(i).contentEditable = true;

}

}

AddColumn = function() {

// var q = document.getElementById('myTable').rows.length;

//for(i=0; i

// var row = document.getElementById('myTable').rows[i +1];

// var x = row.insertCell(3).contentEditable = true;

//}

var tbl = document.getElementById('myTable'); // table reference

// open loop for each row and append cell

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

var createCell =tbl.rows[i].insertCell(tbl.rows.length).contentEditable = true ;

}

}

table,

th,

td {

table-layout: fixed;

border-style: groove;

border-width: 3px;

height:90px;

width:90x;

col-width:90px

}

th {

text-align: center;

height:90px;

width:90px;

}

tr{

width:90px;

height:90px;

}

Student Name	Student ID	Assignment 1	Final Grade

Add Row

Add Column

Load data

Save data

Calculate Average