AW PHP/MySQL Problem?

AW rocks! but i am getting an error which says 'UNDEFINED' along

$userid = @mysql_fetch_assoc($data);

i need to pass userid for the hyperlink. grateful for any future help! its for a school project...

<link href="includes/grid.css" rel="stylesheet" type="text/css" >
</link>
<script src="includes/grid.js"></script>
view users
<div class="reports"> 
<?php

include("includes/set_grid.php"); 
function activewidgets_grid($name, &$data){

    $row_count = @mysql_num_rows($data);
    $column_count = @mysql_num_fields($data);
    // im getting an error here
    $userid = @mysql_fetch_assoc($data);

    $columns_viewusers = "var ".$name."_columns = ['', '', 'id', 'username', 'firstname','lastname', 'email address','st.#', 'bldg','street', 'city', 'province', 'mobile', 'branch'];\n";
    $rows = "var ".$name."_data = [\n";
    while ($result = @mysql_fetch_array($data)) {
        $rows .= "["; 
        $rows .= "\"". "<a href='admin_home.php?do=edit_user&uid=". $userid ."'>edit</a>" ."\", ";
        $rows .= "\"". "<a href='admin_home.php?do=delete_user&uid='>delete</a>" ."\", ";		
        for ($i=0; $i < $column_count; $i++) {			
            $rows .= "\"". activewidgets_html($result[$i])."\", ";
        }
        $rows .= "],\n";
    }
    $rows .= "];\n";

    $html = "<"."script".">\n";
    $html .= $columns_viewusers;
    $html .= $rows;
    $html .= "try {\n";
    $html .= "  var $name = new Active.Controls.Grid;\n";
    $html .= "  $name.setRowCount($row_count);\n";
    $html .= "  $name.setColumnCount($column_count);\n";
    $html .= "  $name.setDataText(function(i, j){return ".$name."_data[i][j]});\n";
    $html .= "  $name.setColumnText(function(i){return ".$name."_columns[i]});\n";

    $html .= "  document.write($name);\n";
    $html .= "}\n";
    $html .= "catch (error){\n";
    $html .= "  document.write(error.description);\n";
    $html .= "}\n";
    $html .= "</"."script".">\n";

    return $html;
}


require_once('../*****/dbconnection.php'); 
$query_adminu = "SELECT adminuserid, adminusername, adminuser_firstname, adminuser_lastname, adminuser_email, adminuser_streetnumber, adminuser_bldg, adminuser_street, adminuser_city, adminuser_province, adminuser_mobile,   branchid FROM admin_users";
$adminu = mysql_query($query_adminu, $dbconnection);

    // grid object name
    $name = "obj";

    // SQL query
    $query = $query_adminu;

    mysql_select_db("thesis");

    // query results
    $data = $adminu;

    // add grid to the page
    echo activewidgets_grid($name, $data);

?> 
</div>