var i = 0, s1, s2, c1 = 0, c2 = 0;

$j = jQuery.noConflict();

$j(function(){
   s1 = $j.trim($j("#intro1b_collection").html()).split(($j.browser.msie) ? "<BR>" : "<br>");
   s2 = $j.trim($j("#intro2b_collection").html()).split(($j.browser.msie) ? "<BR>" : "<br>");

   setInterval(introxb_rotate, 3000);
   introxb_rotate();
});

function introxb_rotate()
{
    if (i++%2 == 0)
        $j("#accroche1 div").slideUp("slow", function(){
            $j("#accroche1 div").text(s1[c1++%10]).slideDown("slow");
        });
    else
        $j("#accroche2 div").slideUp("slow", function(){
            $j("#accroche2 div").text(s2[c2++%10]).slideDown("slow");
        });
}