PHP MySQL display data with clickable table rows

i am trying to display MySQL Data using PHP in a HTML Table. the rows are currently clickable and the checkbox puts a number from the data into a textbox and then adds on each checkbox you tick.

I want to keep this however when you single click the row it will check the box and put the number into the textbox (like it does when the text box is checked)

then if the row is double clicked it will open a new webpage

here is my current PHP Code:

<script>
function correctNumber(number) {
    return (parseFloat(number.toPrecision(12)));
}

function add(total, this_chk_bx) {
    var thetotal = (form2.thetotal.value * 1);
    var total = total * 1;


    if (this_chk_bx.checked == true) {
        //add if its checked
        form2.thetotal.value = correctNumber(thetotal + total);
    } else {
        //subtract if its unchecked
        form2.thetotal.value = correctNumber(thetotal - total);
    }
}
</script>

<form name="form2">
  <table width="100%" border="0" cellspacing="0" cellpadding="10">
  <tr>
    <td colspan="6"><form action="../">
    <select name="status" onchange="window.open(this.options[this.selectedIndex].value,'_top')">
    <option value="?status=" <?php if($_GET["status"] == '') { echo 'selected="selected"'; } ?>>Not Paid</option>
    <?php
    $sql2="SELECT * from billing_pdf_archive where status <> '' group by status ";
    $rs2=mysql_query($sql2,$conn) or die(mysql_error());
    while($result2=mysql_fetch_array($rs2))
    {
        echo ('<option value="?status='.$result2['status'].'"');
        if(($_GET['status']) == ($result2['status'].''))
        {
            echo (' selected ');
        }
        echo ('>'.$result2['status'].'</option>');
        }
    ?>
    </select>
    </form>
  </tr>
  <tr>
    <td width="20">&nbsp;</td>
    <td width="150"><strong><?php echo $invoicenumber_link; ?></strong></td>
    <td width="250"><strong><?php echo $company_link; ?></strong></td>
    <td width="100"><strong><?php echo $date_link; ?></strong></td>
    <td width="100"><strong><?php echo $total_link; ?></strong></td>
    <td width="100">&nbsp;</td>
  </tr>
<?php
$rs=mysql_query($sql,$conn) or die(mysql_error());
while($result=mysql_fetch_array($rs))
{
    $counter++;
    $sql2="SELECT * from customer where sequence = '".$result["customer_sequence"]."' ";
    $rs2=mysql_query($sql2,$conn) or die(mysql_error());
    $result2=mysql_fetch_array($rs2);

    $sql3="SELECT * from reseller where sequence = '".$result["reseller_sequence"]."' ";
    $rs3=mysql_query($sql3,$conn) or die(mysql_error());
    $result3=mysql_fetch_array($rs3);

    if($result["customer_sequence"] != '0')
    {
        $company = $result2["company"];
    }
    elseif($result["reseller_sequence"] != '0')
    {
        $company = '<strong>Reseller: </strong>'.$result3["company"];
    }

    $total = $result["total"];

    $date = date("d/j/Y",strtotime($result['datetime']));

    echo '<tr class="notfirst" style="cursor:pointer;" onclick="document.location=\'editinvoice.php?seq='.$result["sequence"].'&inv='.$result["invoice_number"].'\'">
                <td width="20"><input type="checkbox" name="check'.$counter.'" id="check'.$counter.'" onclick=\'add('.$total.', this);\' /></td>
                <td width="150">'.$result["invoice_number"].'</td>
                <td width="250">'.$company.'</td>
                <td width="100">'.$date.'</td>
                <td width="100">&pound;'.$result["total"].'</td>
                <td width="100">&pound;'.$result["total"].'</td>
            </tr>';
}
?>
<tr>
    <td colspan="6">&nbsp;</td>
</tr>
<tr>
    <td colspan="6">&nbsp;</td>
</tr>
</table>

<div class="div-bottom">
<table width="100%" border="0" cellspacing="0" cellpadding="10">
<tr>
    <td>&nbsp;</td>
    <td><strong>Total: </strong><input type="text" name="thetotal" value="0" /></td>
    <td><strong>VAT:</strong> </td>
  </tr>
</table>
</div>
</form>

any ideas the best way round this?