I got a class named Table that encapsulate some table handling.
Below are two of it's methods.

Why do the alert report "object HTMLTableRowElement" instead of "object object". Shouldnt "this" contain a reference to the Table class?


Table.prototype.modifiers = function(event)
{
if (!event)
event = window.event;
this.mShiftKey = event.shiftKey;
this.mCtrlKey = event.ctrlKey;
alert(this);
}
Table.prototype.display = function (table)
{
this.mParentTable = table;
for (var i = 1; i < this.mRows.length; ++i)
{
var row = table.insertRow(i);
var method = this.SelectRows;
row.onclick = mouseDown(row);
row.onmousedown = this.modifiers;

var cell = null;
for (var j = 0; j < this.mRows[i].length; ++j)
{
cell = row.insertCell(j);
cell.textContent = this.mRows[i][j];

// ThreadId
if (j == 2)
cell.style.color = this.addThread(this.mRows[i][j]);
}

//row.cells[1].style.border = '1px solid';
if (i % 5 == 0)
row.className = 'fifthRow';
}
}