diff --git a/module/execution/js/create.js b/module/execution/js/create.js
index 3ee176db92..1f8537bf40 100644
--- a/module/execution/js/create.js
+++ b/module/execution/js/create.js
@@ -87,33 +87,29 @@ $(function()
         /* Determine whether the products of the same branch are linked. */
         $("#productsBox select[name^='products']").each(function()
         {
-            var productID       = $(this).val();
-            products[productID] = new Array();
+            var productID = $(this).val();
+            if(typeof(products[productID]) == 'undefined') products[productID] = new Array();
             if(multiBranchProducts[productID])
             {
-                $("#productsBox select[name^='branch']").each(function()
+                var branchID = $(this).closest('.input-group').find("select[id^=branch]").val();
+                if(products[productID][branchID])
                 {
-                    var branchID = $(this).val();
-                    if(products[productID][branchID])
-                    {
-                        existedBranch = true;
-                        return false;
-                    }
-                    else
-                    {
-                        products[productID][branchID] = branchID;
-                    }
-                })
+                    existedBranch = true;
+                }
+                else
+                {
+                    products[productID][branchID] = branchID;
+                }
                 if(existedBranch) return false;
             }
-        })
+        });
 
         if(existedBranch)
         {
             bootbox.alert(errorSameBranches);
             return false;
         }
-    })
+    });
 });
 
 function showLifeTimeTips()
diff --git a/module/execution/js/edit.js b/module/execution/js/edit.js
index 81039a601b..0c09b6bfe8 100644
--- a/module/execution/js/edit.js
+++ b/module/execution/js/edit.js
@@ -10,33 +10,29 @@ $().ready(function()
         /* Determine whether the products of the same branch are linked. */
         $("#productsBox select[name^='products']").each(function()
         {
-            var productID       = $(this).val();
-            products[productID] = new Array();
+            var productID = $(this).val();
+            if(typeof(products[productID]) == 'undefined') products[productID] = new Array();
             if(multiBranchProducts[productID])
             {
-                $("#productsBox select[name^='branch']").each(function()
+                var branchID = $(this).closest('.input-group').find("select[id^=branch]").val();
+                if(products[productID][branchID])
                 {
-                    var branchID = $(this).val();
-                    if(products[productID][branchID])
-                    {
-                        existedBranch = true;
-                        return false;
-                    }
-                    else
-                    {
-                        products[productID][branchID] = branchID;
-                    }
-                })
+                    existedBranch = true;
+                }
+                else
+                {
+                    products[productID][branchID] = branchID;
+                }
                 if(existedBranch) return false;
             }
-        })
+        });
 
        if(existedBranch)
        {
            bootbox.alert(errorSameBranches);
            return false;
        }
-    })
+    });
 });
 
 $(function()
diff --git a/module/project/js/create.js b/module/project/js/create.js
index a4aedf2d0d..84088976fc 100644
--- a/module/project/js/create.js
+++ b/module/project/js/create.js
@@ -34,33 +34,29 @@ $(function()
         /* Determine whether the products of the same branch are linked. */
         $("#productsBox select[name^='products']").each(function()
         {
-            var productID       = $(this).val();
-            products[productID] = new Array();
+            var productID = $(this).val();
+            if(typeof(products[productID]) == 'undefined') products[productID] = new Array();
             if(multiBranchProducts[productID])
             {
-                $("#productsBox select[name^='branch']").each(function()
+                var branchID = $(this).closest('.input-group').find("select[id^=branch]").val();
+                if(products[productID][branchID])
                 {
-                    var branchID = $(this).val();
-                    if(products[productID][branchID])
-                    {
-                        existedBranch = true;
-                        return false;
-                    }
-                    else
-                    {
-                        products[productID][branchID] = branchID;
-                    }
-                })
+                    existedBranch = true;
+                }
+                else
+                {
+                    products[productID][branchID] = branchID;
+                }
                 if(existedBranch) return false;
             }
-        })
+        });
 
         if(existedBranch)
         {
             bootbox.alert(errorSameBranches);
             return false;
         }
-    })
+    });
 });
 
 /**
diff --git a/module/project/js/edit.js b/module/project/js/edit.js
index 5b143b401c..77100f6632 100644
--- a/module/project/js/edit.js
+++ b/module/project/js/edit.js
@@ -102,33 +102,29 @@ $(function()
        /* Determine whether the products of the same branch are linked. */
        $("#productsBox select[name^='products']").each(function()
        {
-           var productID       = $(this).val();
-           products[productID] = new Array();
+           var productID = $(this).val();
+           if(typeof(products[productID]) == 'undefined') products[productID] = new Array();
            if(multiBranchProducts[productID])
            {
-               $("#productsBox select[name^='branch']").each(function()
+               var branchID = $(this).closest('.input-group').find("select[id^=branch]").val();
+               if(products[productID][branchID])
                {
-                   var branchID = $(this).val();
-                   if(products[productID][branchID])
-                   {
-                       existedBranch = true;
-                       return false;
-                   }
-                   else
-                   {
-                       products[productID][branchID] = branchID;
-                   }
-               })
+                   existedBranch = true;
+               }
+               else
+               {
+                   products[productID][branchID] = branchID;
+               }
                if(existedBranch) return false;
            }
-       })
+       });
 
        if(existedBranch)
        {
            bootbox.alert(errorSameBranches);
            return false;
        }
-   })
+   });
 });
 
 /**