//解决多模态框bug 
              $(".modal").on("hidden.bs.modal", function() { 
                  $("body").addClass("modal-open"); 
                  $(".modal.fade.in").css("display","block"); 
              }); 
            //控制模态窗样式位置 
               $("#modal-6").on("shown.bs.modal",function(){ 
                      $(this).css({ 
                          "background":"rgba(0,0,0,0.3)", 
                          "top":"100px", 
                          "filter":"alpha(opacity=70)", 
                          "-ms-filter": "progid:DXImageTransform.Microsoft.gradient(GradientType=1,startColorstr=#80000000,endColorstr=#80000000)" 
                      });  
                  });