@Sanford - Yes I do have the ability to add javascript to the page. For somereason I posted everything in that you asked and I still did not see the email populate in Marketo.. Not sure what I am doing wrong. Yes I plan on changing the pop up message as well. I am leaving it until I get this integrat ion thing fixed. Thanks for your help everyone
Anyone willing to share real life working examples (URLs) of the a server side or client side post in action? We might need to use this for a current project and I'm curious how others are implementing it.