JQuery :: Mouse Hover In Additional Product?

I have problem about mouse hover in JQuery, the problem is that the main image not change when I move from additional image 1 to additional image 2. My site sample : [URL]. It work when I move to other additional with move mouse slowly.

This my code :
$(document).ready(function(){ $('#thumbs a').hover( function() {
var currentBigImage = $('#image img').attr('src');
var newBigImage = $(this).attr('href');
var currentThumbSrc = $(this).attr('rel');
switchImage(newBigImage, currentBigImage, currentThumbSrc); },
function() {
var currentBigImage = $('#image img').attr('src');
var newBigImage = '[URL]';
var currentThumbSrc = $(this).attr('rel'); switchImage(newBigImage, currentThumbSrc, currentBigImage); } );
function switchImage(imageHref, currentBigImage, currentThumbSrc) {
var theBigImage = $('#image'); if (imageHref != currentBigImage) {
theBigImage.fadeOut(250, function(){ theBigImage.attr('src', imageHref).fadeIn(250);
var newImageDesc = $("#thumbs a img[src='"+currentThumbSrc+"']").attr('alt'); }); } } });