How to Retrieve the values of dynamically inserted rows

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Javascript

<script>
function addRow(tableID) {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;
var row = table.insertRow(rowCount);
var colCount = table.rows[0].cells.length;
for(var i=0; i<colCount; i++) {
var newcell = row.insertCell(i);
newcell.innerHTML = table.rows[0].cells[i].innerHTML;
//alert(newcell.childNodes);
switch(newcell.childNodes[0].type) {
case "text":
newcell.childNodes[0].value = "";
break;
case "checkbox":
newcell.childNodes[0].checked = false;
break;
case "select-one":
newcell.childNodes[0].selectedIndex = 0;
break;
}
}
}

function deleteRow(tableID) {
try {
var table = document.getElementById(tableID);
var rowCount = table.rows.length;

for(var i=0; i<rowCount; i++) {
var row = table.rows[i];
var chkbox = row.cells[0].childNodes[0];
if(null != chkbox && true == chkbox.checked) {
if(rowCount <= 1) {
alert("Cannot delete all the rows.");
break;
}
table.deleteRow(i);
rowCount--;
i--;
}
}
}catch(e) {
alert(e);
}
}
</script>

<table class="Grid" border="1" cellpadding="0" cellspacing="0" style="border-bottom:0px;">
<tbody id="selEmp">
<tr class="Caption">
<th>Sel</th>
<th width="46%">PROJECT NAME</th>
<th width="14%">NUMBER OF<br>YEARS</th>
<th width="14%">SCOPE OF<br>WORKS VALUES</th>
<th width="14%">SITE CONDITION<br>VALUES</th> <th >TOTAL PER<br>PROJECT</th>
<th><INPUT class="buttonClass" type="button" value="Add" onClick="addRow('dataTable')" />&nbsp;&nbsp;</th>
<th><INPUT class="buttonClass" type="button" value="Del" onClick="deleteRow('dataTable')" /></th>
</tr>
<tbody id="dataTable">
<tr>
<TD><INPUT type="checkbox" name="chk" width="2%"/></TD>
<td style='width:45%;' align="center">
<select name="Check" id="Check">
<option value="1">Java</option>
<option value="2">PHP</option>
<option value="3">Java Script</option>
<option value="4">PERL</option>
<option value="5">ASP</option>
<option value="6">ASP .net</option>
<option value="7">Java Server Pages</option>
<option value="8">EJB</option>
<option value="9">FORTRAN</option>
<option value="10">COBOL</option>
</select>
</td>
<TD align="center"><INPUT type="text" size="6" name="no_years" value="0"/></TD>
<TD align="center"><INPUT type="text" size="6" name="works_val" value="0"/></TD>
<TD align="center"><INPUT type="text" size="6" name="site_cond" value="0"/></TD>
<TD align="center"><INPUT type="text" size="6" name="tot_prj" value="0"/></TD>
</tr>

</tbody>

</tbody>
</table>