function generate_table() {
  // get the reference for the body
  var body = document.getElementsByTagName("body")[0];

  // creates a  element and a  element
  var tbl = document.createElement("table");
  var tblBody = document.createElement("tbody");

  // creating all cells
  for (var i = 0; i < 2; i++) {
    // creates a table row
    var row = document.createElement("tr");

    for (var j = 0; j < 2; j++) {
      // Create a  in the 
 element and a text node, make the text
      // node the contents of the 
, and put the 
 at
      // the end of the table row
      var cell = document.createElement("td");
      var cellText = document.createTextNode("cell in row "+i+", column "+j);
      cell.appendChild(cellText);
      row.appendChild(cell);
    }

    // add the row to the end of the table body
    tblBody.appendChild(row);
  }

  // put the 

  tbl.appendChild(tblBody);
  // appends  into 
  body.appendChild(tbl);
  // sets the border attribute of tbl to 2;
  tbl.setAttribute("border", "2");
}