Dynamic Add Table Row With Javascript

India Germany France United States Switzerland

Script:
<script language="javascript">
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;
        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>



    <input value="Add Row" onclick="addRow('dataTable')" type="button">

    <input value="Delete Row" onclick="deleteRow('dataTable')" type="button">

    <table id="dataTable" border="1" width="350px">
        <tbody><tr>
            <td><input name="chk" type="checkbox"></td>
            <td><input name="txt" type="text"></td>
            <td>
                <select name="country">
                    <option value="in">India</option>
                    <option value="de">Germany</option>
                    <option value="fr">France</option>
                    <option value="us">United States</option>
                    <option value="ch">Switzerland</option>
                </select>
            </td>
        </tr>
    </tbody></table>