title: Input data from one form to another(external page)
body: <p>I created a textfield on my index page and I need to input the value of this textfield in the Paypal web site. So when the user type £25 and click donate the Paypal website opens and the value inserted (25) will be posted in Donation Amount textfield of the Paypal page. So the user don't need to retype. I have the paypal buttom already working on my index page.</p>
  
  <p>I know there must be a way to do this.</p>