title: pass a value into next page
body: <p>I have login page, once logged in I create a session variable to store the UserName.
  I've used this variable to retrieve info for this User from Account table with AccountID, name etc and I return the AccountID on the page using a label (lblAccountID). </p>
  
  <p>I have a button to "Add Funds" to this account, which redirects to the AddFunds.aspx page</p>
  
  <p>How can I pass the AccountID into the AddFunds.aspx page which will be used to insert details into Funds table which has the AccountID.</p>
  
  <p>I don't want the AccountID to be visible on the AddFunds.aspx page.</p>