[html5] Locking the Screen

[Doug Hardie]

I have a customer who just will not wait for a page to load.  He is clicking on a button before all of the field data has been displayed, specifically the hidden fields.  As a result the server gets a GET request with some of the fields missing.  I have been trying to find a way to "lock" the screen once a button has been pressed and not allow the browser to process any clicks until the page is completely loaded.  Is there a way to make that happen?