Comparing tables (parent window and child window)

[jerkyjerk]

Ei guys..newbie in programming..ju st want to ask how will I compare the contents of particular cell of the table(from parent window) to the contents of a cell of the table (child window)? how will I use ID for this?
I need to compare because If the two contents are the same, no need to add the table (from the child window) to the table on the parent window..

this is my code

Child window
note: cell3 contents will be the basis of comparison

        var tbody = self.opener.document.getElementById("ProgramList").getElementsByTagName("tbody")[0]; 
        var row = self.opener.document.createElement("TR"); 
        var cell1 = self.opener.document.createElement("TD"); 
        var inp1 =  self.opener.document.createElement("INPUT"); 
        inp1.setAttribute("type","checkbox"); 
        cell1.appendChild(inp1);
        var cell2 = self.opener.document.createElement("TD"); 
        var inp2 =  self.opener.document.createElement("INPUT"); 
        inp2.setAttribute("type","text");   // for type
        inp2.setAttribute("size","3");      // for size
        inp2.setAttribute("value","3");     // for value
        cell2.appendChild(inp2);
        cell2.appendChild(inp2);
        cell2.appendChild(inp2);
        var cell3 = self.opener.document.createElement("TD"); 
        cell3.innerHTML = "article009";       //THIS WILL BE COMPARED
        var cell4 = self.opener.document.createElement("TD"); 
        cell4.innerHTML = "ルパン三世 2nd.シリーズ 第3話"; 
        var cell5 = self.opener.document.createElement("TD"); 
        cell5.innerHTML = "都度課金"; 
        var cell6 = self.opener.document.createElement("TD"); 
        cell6.innerHTML = "215円"; 
        var cell7 = self.opener.document.createElement("TD"); 
        cell7.innerHTML = "2007/5/15"; 
        var cell8 = self.opener.document.createElement("TD"); 
        cell8.innerHTML = "2008/5/14"; 
        var cell9 = self.opener.document.createElement("TD"); 
        cell9.innerHTML = "2008/5/14"; 
        var cell10 = self.opener.document.createElement("TD"); 
        cell10.innerHTML = "2008/5/14"; 
        var cell11 = self.opener.document.createElement("TD"); 
        cell11.innerHTML = "flet's東"; 
        row.appendChild(cell1); 
        row.appendChild(cell2); 
        row.appendChild(cell3); 
        row.appendChild(cell4); 
        row.appendChild(cell5); 
        row.appendChild(cell6); 
        row.appendChild(cell7); 
        row.appendChild(cell8); 
        row.appendChild(cell9); 
        row.appendChild(cell10); 
        row.appendChild(cell11); 
        tbody.appendChild(row); 
 

now this is the table from the parent window

[HTML] <table id="ProgramList " class="searchLi st">
<caption align=left><b>関 連付け設定されてい る商品</b></caption>
<tr>
<th>&nbsp;</th>
<th>表示順</th>
<th>商品識別子</th>
<th>商品名</th>
<th>料金タイプ</th>
<th>料金</th>
<th>販売開始</th>
<th>販売終了</th>
<th>公開開始</th>
<th>配信終了</th>
<th>サイト</th>
</tr>
<tr>
<td><input type="checkbox" name="商品ID1" value="meta_rup in3firstsample-2" checked="checke d"/></td>
<td><input type="text" name="order01" size="3" value="1"></td>
<td>article00 5</td> //THIS WILL BE COMPARED
<td>ルパン三世 2nd.シリーズ 第1話</td>
<td>都度課金</td>
<td>515円</td>
<td>2007/5/15</td>
<td>2008/5/14</td>
<td>2007/5/15</td>
<td>2008/5/14</td>
<td>gooBB・flet' s東</td>
</tr>
<tr>
<td><input type="checkbox" name="商品ID1" value="meta_rup in3firstsample-2" checked="checke d"/></td>
<td><input type="text" name="order01" size="3" value="2"></td>
<td>article00 9</td> //THIS WILL BE COMPARED
<td>ルパン三世 2nd.シリーズ 第2話</td>
<td>都度課金</td>
<td>815円</td>
<td>2007/5/15</td>
<td>2008/5/14</td>
<td>2007/5/15</td>
<td>2008/5/14</td>
<td>flet's西・fle t's東</td>
</tr>
</table>[/HTML]

Hope you guys could help me...thank you..

[acoder]

var table = window.opener.document.getElementById("ProgramList"); // get the table
var rows = table.getElementsByTagName("tr"); // get rows
for (i = 0; i < rows.length; i++) {
  var cells = rows[i].getElementsByTagName("td");
  if (cells.length >= 2) {
    thirdCell = cells[2];
    // compare cells here...
  }
}