Need help with java script

i am working on an application and i create a tr and a td from javascript in witch i insert some information...i also have a text box in a jsp form and when i press a letter the table is pupped up....i need to navigate in that table...how can i set Attributes like onkeydown to a tr or a td from javascript...
the code looks like this:
jsp: .....
<form name="autofillform" action="autocomplete" method="get">
<table>
<tr>
<td>
<input type="text" size="20" autocomplete="off" id="complete-field" name="addressee_contact" onkeyup="doCompletion();" onkeydown="return checkKey(this.form)">
</td>
</tr>
<tr>
<td id="auto-row" colspan="2">&nbsp;
<td/>
</tr>
</table>
</form>
<%--<ajax:autocomplete source="complete-field" target="complete-field" baseurl="/miruGlobal/autocomplete.do" parameters="complete-field={id}" minimumCharacters="1" parser="new ResponseXmlToHtmlListParser()"/>--%>
</td>
</tr>
<tr>
<td style="vertical-align: top; text-align: justify;">
</td>
<td style="vertical-align: top;">
<div class="tableContainer" style="position: absolute; border : 1px black" id="menu-popup">
<table class="scrollTable" id="tableContent" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="120px" height="35px" style="background-color: rgb(255, 255, 255)">
<table id="completeTable" cellpadding="0" cellspacing="0">
</table>
</td>
</tr>
</table>
</div>
</td>
</tr>
.......

and js:
function appendDest(Name,idAddressee) {
var numeCell;
var row;
var nameCell;
if (isIE) {
row = completeTable.insertRow(completeTable.rows.length);
nameCell = row.insertCell(0);
} else {
row = document.createElement("tr");
nameCell = document.createElement("td");
row.appendChild(nameCell);
completeTable.appendChild(row);
}
row.className = "popupRow";
nameCell.setAttribute("background-color", "white");


var linkElement = document.createElement("a");
linkElement.className = "popupItem";
linkElement.setAttribute("href", "autocomplete.do?action=lookup&id=" + idAddressee);
linkElement.appendChild(document.createTextNode(Name));
nameCell.appendChild(linkElement);
}

function checkKey(form){
var key = event.keyCode;
if(key == 38){
if(document.all.completeTable.rowIndex != 0){
alert(document.all.completeTable.rowIndex);
return false
}
else{ alert("Index la 0");}
}
else if(key == 40){
if(document.all.completeTable.rowIndex != document.all.completeTable.rows.length - 1){
alert(document.all.completeTable.rowIndex);
document.all.completeTable.rows[0].cells[0].children[0].focus();
return false
}else{alert("Index bound")}
}
}

 

Do you still need help with this. PM me if you need help.