<!--最外层包裹的模态框-->
<div class="modal fade" id="outermost" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
　　<!--第一个模态框--> 
　　<div class="modal-dialog modalWith firstModal" id="productModal" role="document"></div> 
　　<!--第二个模态框--> 
　　<div class="modal" tabindex="-1" role="dialog" id="addproduct" aria-labelledby="myModalLabel"></div> 
　　<!--第三个模态框--> 
　　<div class="modal" tabindex="-1" role="dialog" id="selectProduct" aria-labelledby="myModalLabel"></div> 
</div>

.modal-backdrop.fade {
 filter: alpha(opacity=0);
 opacity: 0;
}
.modal-backdrop.in {
 filter: alpha(opacity=50);
 opacity: .5;}

 .modal-backdrop {
 filter: alpha(opacity=0)!important;
 opacity: 0!important;
}

 $(".modal-backdrop").remove();