I have adjusted my code to have a better handling on setting focus on a div. I thought I would share this approach in case someone would need it.

Once my div is created, I insert the middle section of code to have a universal approach which will add support for all browsers to receive the focus on the div:

cScript = cScript + "window.parent.oDiv=window.parent.document.createElement(""div"")" + oApp.cCR

' Use to have a universal way to add support for set focus on the div
' This is cross browser
' This allows to press Esc immediately
' This avoids the Enter key, when the div is active, on Firefox, to bring the user to the home page
' This avoids the div to bounces the Html content to the right if the browser is not wide enough
cScript = cScript + "window.parent.oDiv.tabIndex=-1" + oApp.cCR

cScript = cScript + "window.parent.document.body.appendChild(window.parent.oDiv)" + oApp.cCR

Then, in pretty much the same section, down below, when I have finished aligning my div, I have this to set the focus:

cScript = cScript + "window.parent.oDiv.focus()" + oApp.cCR

Internet Explorer does not require the middle section to work. However, having it there will make it ok with Firefox, Google Chrome and Safari.