Started working on client-side restriction of donations

Signed-off-by: Edouard Poitras <edouard@eclipse.org>
diff --git a/content/en_index.php b/content/en_index.php
index 0caeb87..08fecbb 100644
--- a/content/en_index.php
+++ b/content/en_index.php
@@ -139,7 +139,7 @@
   </div>
   <div id="custom-donation" class="row">
     <div class="col-md-24">
-      <form action="<?php print $Paypal->get_paypal_url(); ?>" method="POST">
+      <form action="<?php print $Paypal->get_paypal_url(); ?>" onsubmit="valid_donation()" method="POST">
         <input type="hidden" name="business" value="<?php print $Paypal->get_donation_email(); ?>"/>
         <input type="hidden" name="item_name" value="Donation"/>
         <input type="hidden" name="no_shipping" value="1"/>
diff --git a/index.php b/index.php
index 24ea4db..65165d0 100644
--- a/index.php
+++ b/index.php
@@ -19,9 +19,9 @@
 $Nav	= new Nav();
 $Menu 	= new Menu();
 $Paypal = new Paypal();
-//$Paypal->set_debug_mode(TRUE);
-//$Paypal->set_sandbox_mode(TRUE);
-//$Paypal->set_show_all(TRUE);
+$Paypal->set_debug_mode(TRUE);
+$Paypal->set_sandbox_mode(TRUE);
+$Paypal->set_show_all(TRUE);
 
 # Begin: page-specific settings.  Change these.
 $pageTitle = "Support Eclipse";
@@ -37,4 +37,15 @@
 
 # Generate the web page
 $App->AddExtraHtmlHeader('<link rel="stylesheet" type="text/css" href="style.css" media="screen" />');
+$App->AddExtraJSFooter('
+<script>
+    function valid_donation () {
+        valid = true;
+        if (document.getElementById("donation-amount").value < 1) {
+            alert("Sorry, only donations above $1 are allowed");
+            valid = false;
+        }
+        return valid;
+    }
+</script>');
 $App->generatePage("solstice", $Menu, NULL, $pageAuthor, $pageKeywords, $pageTitle, $html);
diff --git a/thankyou.php b/thankyou.php
index 62e2e41..3ac635e 100644
--- a/thankyou.php
+++ b/thankyou.php
@@ -36,9 +36,9 @@
 
 // Set up Paypal
 $Paypal = new Paypal();
-//$Paypal->set_debug_mode(TRUE);
-//$Paypal->set_sandbox_mode(TRUE);
-//$Paypal->set_show_all(TRUE);
+$Paypal->set_debug_mode(TRUE);
+$Paypal->set_sandbox_mode(TRUE);
+$Paypal->set_show_all(TRUE);
 // Confirm Donation
 $success = $Paypal->confirm_donation();
 if ($success) {