function validate()
{
	if(document.upgrade.customerEmail.value == "")
	{
		alert("Le courriel doit avoir une valeur.");
		return false;
	}
	if(document.upgrade.activationKey.value == "")
	{
		alert("La cle d'activation doit avoir une valeur.");
		return false;
	}
	if(document.upgrade.desiredProductId.value == "0")
	{
		alert("Selectionner un produit de mise a niveau.");
		return false;
	}
	return true;
}

function slideSwitch() {
    var $active = $('#slideshow IMG.active');

    if ( $active.length == 0 ) $active = $('#slideshow IMG:last');

    // use this to pull the images in the order they appear in the markup
    var $next =  $active.next().length ? $active.next()
        : $('#slideshow IMG:first');

    // uncomment the 3 lines below to pull the images in random order
    
    // var $sibs  = $active.siblings();
    // var rndNum = Math.floor(Math.random() * $sibs.length );
    // var $next  = $( $sibs[ rndNum ] );


    $active.addClass('last-active');

    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            $active.removeClass('active last-active');
        });
}


jQuery(function() {
    setInterval( "slideSwitch()", 5000 );
});