Back function implemented for delete book and edit book

cps/static/js/main.js

@@ -20,7 +20,7 @@ function getPath() {
     return jsFileLocation.substr(0, jsFileLocation.search("/static/js/libs/jquery.min.js"));  // the js folder path
 }
 
-function postButton(event, action){
+function postButton(event, action, location=""){
     event.preventDefault();
     var newForm = jQuery('<form>', {
         "action": action,
@@ -30,7 +30,14 @@ function postButton(event, action){
         'name': 'csrf_token',
         'value': $("input[name=\'csrf_token\']").val(),
         'type': 'hidden'
-    })).appendTo('body');
+    })).appendTo('body')
+    if(location !== "") {
+        newForm.append(jQuery('<input>', {
+            'name': 'location',
+            'value': location,
+            'type': 'hidden'
+        })).appendTo('body');
+    }
     newForm.submit();
 }
 
@@ -212,17 +219,20 @@ $("#delete_confirm").click(function(event) {
                             $( ".navbar" ).after( '<div class="row-fluid text-center" >' +
                                 '<div id="flash_'+item.type+'" class="alert alert-'+item.type+'">'+item.message+'</div>' +
                                 '</div>');
-
                         }
                     });
                     $("#books-table").bootstrapTable("refresh");
                 }
             });
         } else {
-            postButton(event, getPath() + "/delete/" + deleteId);
+            var loc = sessionStorage.getItem("back");
+            if (!loc) {
+                loc = $(this).data("back");
+            }
+            sessionStorage.removeItem("back");
+            postButton(event, getPath() + "/delete/" + deleteId, location=loc);
         }
     }
-
 });
 
 //triggered when modal is about to be shown