.product_img_link img.front-image, .product_image img.front-image{
	top: 0;
}
.product_img_link img.back-image, .product_image img.back-image{
	top: 0;
	left: 0;
  	opacity: 0;
    filter: alpha(opacity = 0);
  	z-index: -1;
}
.pro_first_box.showhoverimage .product_img_link img.back-image, .pro_first_box.showhoverimage .product_image img.back-image{
  	opacity: 1;
    filter: alpha(opacity = 100);
  	z-index: 1;
}