Php et javascript

<?
$tab = array();
while ($row = mysql_fetch_array($result_prod, MYSQL_ASSOC)) {
array_push ($tab,$row['products_image']);
?>)

<script language ="javascript">
myPix =new array(); // ici comment initialiser myPix avec $tab
thisPic = 0;
imgCt = myPix.lenght -1

function Preview (){
if(document.images && thisPic >0){
thisPic--
document.mypicture.src = myPix[thisPic];
}
}

function Preview (){
if(document.images && thisPic < imgCt){
thisPic++
document.mypicture.src = myPix[thisPic];
}
}
</script>