Transferring vales from list to view page

Hi

I'm trying to transfer field values from selected rows on the list page to the view page onload function. So once they select a column some of the selected field can be saved on to a different table.
From going back over the forum I belive this could be done on the ADD page by using:
postvalue("value_fieldname")

^^ I hope that's info is right
Here is my code for example, I'm trying to make $ds_Lead_ID equal to the Lead_ID field from the list page but having no luck.... Any ideas ?? .. thanks in advances
[codebox]view page onload
function ViewOnLoad()

{

global $where;

global $conn;

$myun = @$_SESSION["UserID"];

global $ds_Lead_ID;

$dldate = date("Y:m:d:H:i:s");
$strSQLExists = "select from _clead where ".$where;

$rsExists = db_query($strSQLExists,$conn);

$data=db_fetch_array($rsExists);

if($data["cl_status"]=="active")

{

// if record exists do something
$result = mysql_query("SELECT FROM _cdws WHERE uname like '$myun' ")

or die(mysql_error());
while($row = mysql_fetch_array( $result )) {

$strSQLInsert = "insert into _dlp (dws_cname,abin,lead_id,dlp_date) values ('$myun', '$row[abin]','$ds_Lead_ID','$dldate')";

db_exec($strSQLInsert,$conn);
echo "Got It";
}
}

else

{

// if dont exist do something else

echo "This is not an ACTIVE LEAD";

die();

}

}

[/codebox]