Dynamic Form Not Refreshing On Browser Back

I'm writing php based website that queries a database and writes the html with the results. On the home page, I am querying one database and receiving data to connect to other databases (i.e., database hostname, username, and password). Depending on the link selected, the homepage creates a dynamic form and sends the data via method=post. The next dynamic webpage receives the data via $_POST and connects to a different database for the rest of the website content.

I can successfully select a link on the home page and load the data for the second page the first time, but I have a problem when I hit back on the browser. The browser takes me back to the home page but if I select another link for another database, it does not "post" the new database info and the second page looks the same as the first time it loaded.

Here is my code
Code:
function database(project, hostname, username, password) {document.body.innerHTML += '
<form id="databaseform" action="project.php" method="post"><input type="hidden" name="project" value="' + project + '">
<input type="hidden" name="dbhostname" value="' + hostname + '">
<input type="hidden" name="dbusername" value="' + username + '">
<input type="hidden" name="dbpassword" value="' + password + '">
<input type="hidden" name="dbpassword" value="' + password + '"></form>';document.getElementById("databaseform").submit();}