It appears that Safari on both my Mac and my PC will not show your PDF, doesn't even try to open the window or load the file. And that is because your code is considered a 'pop-up' by Safari and is blocked. Same with Chrome on my Mac. Chrome and Firefox on my PC show it.
Martin Liss
I'm using Safari 6.0.2 on my MAC and after saving your file in Page Source format on my desktop, Safari opened it just fine.
Iphonehelper is correct... if you disable the pop-up blocker in Safari's settings and try to choose a newletter from your drop down list, a pop-up message comes up stating "This site is attempting to open a pop-up window" and gives Block and Allow buttons.
When I try it on my iPhone and choose Allow, Safari locks up for about 30 seconds then crashes... I'm running an iPhone 5 with the latest iOS.