How to set the Ongui's GUILayout.BeginArea in a panel???

ScrollView is generate by Ongui.

can i set the ScrollView plugin to a panel as a child under the panel.(or other solution)

because i want to the GUILayout do not cover other panel.

I do not want to use ngui. can i solve this problem??

Please help me T.T.....

cover other panel

         GUI.skin = myskin;
         scrollPosition = new Vector2(0, downsave);

         GUILayout.BeginArea(new Rect(ww, 60f, Screen.width, Screen.height - 160), GUI.skin.window);
         scrollPosition = GUILayout.BeginScrollView(scrollPosition, false, true);
         GUILayout.BeginVertical(GUI.skin.box);
         //  int a = 0;

         //  foreach (string item in ProductName)
         for (int i = 0; i < ProductName.Length; i++)
         {
        
             string name = ProductName[i] + "\n\nUpload Date:" + UploadDate[i] + "\n";
             GUIContent gi = new GUIContent(name, CoverPictureb[i]);
             if (GUILayout.Button(gi, GUILayout.Width(420), GUILayout.Height(100)))
             {
                 proID = ProductID[i];
                 Debug.Log(ProductName.Length);
             }

         }

         GUILayout.EndVertical();
         GUILayout.EndScrollView();
         GUILayout.EndArea();