Bannerrotation, hvad er galt ?

Hey,

Jeg har prøvet at lave en bannerrotation til min hjemmeside, men jeg kan ikke få det til at virke. Er der nogen, som kan se hvad der er galt med dette?

<?php

$foresp = mysql_query("SELECT id, pic1, pic1spg, pic1url, pic2, pic2spg, pic2url, pic3, pic3spg, pic3url, pic4, pic4spg, pic4url, pic5, pic5spg, pic5url FROM banner WHERE id = '1' ORDER BY id DESC LIMIT 0, 1");

while($data = mysql_fetch_array($foresp)){


$tid1 = (double)microtime();
srand((double)microtime()*1000000);

if(($pic1spg == "1") && ($pic2spg == "0") && ($pic3spg == "0") && ($pic4spg == "0") && ($pic5spg == "0")) { $tal = "1"; }

if(($pic1spg == "1") && ($pic2spg == "1") && ($pic3spg == "0") && ($pic4spg == "0") && ($pic5spg == "0")) { $tal = rand(0,1); }

if(($pic1spg == "1") && ($pic2spg == "1") && ($pic3spg == "1") && ($pic4spg == "0") && ($pic5spg == "0")) { $tal = rand(0,2); }

if(($pic1spg == "1") && ($pic2spg == "1") && ($pic3spg == "1") && ($pic4spg == "1") && ($pic5spg == "0")) { $tal = rand(0,3); }

if(($pic1spg == "1") && ($pic2spg == "1") && ($pic3spg == "1") && ($pic4spg == "1") && ($pic5spg == "1")) { $tal = rand(0,4); }

switch($tal){
    case (0):
        $pic = "$data[pic1]";
        $url = "$data[pic1url]";
        break;
    case (1):
        $pic = "$data[pic2]";
        $url = "$data[pic2url]";
        break;
    case (2):
        $pic = "$data[pic3]";
        $url = "$data[pic3url]";
        break;
    case (3):
        $pic = "$data[pic4]";
        $url = "$data[pic4url]";
        break;
    case (4):
        $pic = "$data[pic5]";
        $url = "$data[pic5url]";
        break;

}

}

?>

Den udskriver hele tiden den første mulighed - altså $tal = 0