I would like to put a button on my one page web application that allows a user to send a link through Gmail. I found that some websites such as addthis.com provide such a button, however this button automatically uses the link from the url bar. Since I have a one page web application the link in the url bar will always be the same. I need to be able to to put the link in the button myself (which is possible with, for example, the Facebook and Twitter share buttons).
How can I create a Gmail button that can be used to share a link?
Thank you.