Issue 1128 - Added ADC as supporter to Manifesto page

head.html

 <link rel="canonical" href="http://acceptableads.org/"/>
 <meta property="og:type" content="website"/>
 <meta property="og:image" content="http://acceptableads.org/images/manifesto/acceptable-ads-manifesto-share.png?a=show"/>
 <meta property="og:url" content="http://acceptableads.org"/>
 <meta name="google-site-verification" content="3deBAaPY4M2OuOe576R36TC28S5svlfRRsdaGS6WCXg"/>
 <meta charset="utf-8"/>
 <meta name="viewport" content="width=device-width, initial-scale=1"/>
 <style type="text/css">
 @font-face
 {
@@ skipping 475 matching lines @@
   if ("textContent" in signeesCount)
     signeesCount.textContent = count;
   else
     signeesCount.innerText = count;
 }
 
 function addListener(obj, type, listener, useCapture)
 {
   if ("addEventListener" in obj)
   {
-    obj.addEventListener(type, listener, useCapture);
+    obj.addEventListener(type, function(ev)
+    {
+      if (listener(ev) === false)
+        ev.preventDefault();
+    }, useCapture);
   }
   else
   {
     if (type == "DOMContentLoaded")
       type = "load";
     
     obj.attachEvent("on" + type, function()
     {
-      listener(event);
+      if (listener(event) === false)
+        event.returnValue = false;
     });
   }
 }
 
 addListener(window, "DOMContentLoaded", function(ev)
 {
   fetchNumberOfSignees();
 
   var moreSupporters = document.getElementById("supporters-more-link");
   addListener(moreSupporters, "click", function(ev)
   {
     var overflow = document.getElementById("supporters-overflow");
     overflow.removeAttribute("hidden");
     moreSupporters.parentNode.removeChild(moreSupporters);
-    ev.preventDefault();

[Wladimir Palant, 2014/08/13 20:44:47]

Had to look up - this is only implemented starting with MSIE9. Should we make
this backwards compatible?

if ("preventDefault" in ev)
  ev.preventDefault();
else
  ev.returnValue = false; // MSIE 8.0 and below

[Thomas Greiner, 2014/08/16 08:59:30]

We already consider IE8 with the addListener() function so I'm in favor of
making this backwards compatible. Apparently, preventDefault() was introduced
together with addEventListener() so I decided to handle that directly in
addListener().

+    
+    return false;
   }, false);
   
   var readmore = document.getElementById("readmore");
   addListener(readmore, "click", function(ev)
   {
     var fulltext = document.getElementById("fulltext");
     if (fulltext.hasAttribute("hidden"))
       fulltext.removeAttribute("hidden");
     else
       fulltext.hidden = "hidden";
     
-    ev.preventDefault();
-    ev.stopPropagation();
+    if ("stopPropagation" in ev)
+      ev.stopPropagation();
+    
+    return false;
   }, false);
   
   var shareTitle = document.getElementById("share-text-title")[textAttr];
   var shareDescription = document.getElementById("share-text-description")[textAttr];
   var facebookButton = document.getElementById("facebook");
   facebookButton.href = "https://www.facebook.com/sharer/sharer.php?s=100&p%5Btitle%5D="
     + encodeURIComponent(shareTitle)
     + "&p%5Bsummary%5D="
     + encodeURIComponent(shareDescription)
     + "&p%5Burl%5D=http%3A%2F%2Facceptableads.org%2F";
@@ skipping 26 matching lines @@
     }
   }
   else if (scrollTop < placeholder.offsetTop + placeholder.offsetHeight - 100)
   {
     classes.splice(classes.indexOf("collapsed"), 1);
     placeholder.style.height = "0px";
     social.className = classes.join(" ");
   }
 }
 
-addListener(window, "scroll", checkCollapse);
-addListener(window, "resize", checkCollapse);
+addListener(window, "scroll", checkCollapse, false);
+addListener(window, "resize", checkCollapse, false);
 --></script>