I've been having problems the past few days getting a page to look okay to NN4 users. Finally, I decided that making a page compatible with NN4x AND using CSS requires more knowledge than I have, and way too much time. But, I'm getting enough NN4 visitors that I feel I need to take them into account, at least by letting them know why the page doesn't look right to them.
Someone said that only NN4x recognizes document.layers. So my plan was to display an explanatory popup or an alert box using document.layers. I have a few questions about how I should procede.
First, is there any kind of popup stopper that works with NN4? A popup would really be my preference over an alert box, but with so many popup stoppers in use these days I wasn't sure if a popup was best. If no (or few) popup stoppers work with NN4, I'll probably skip the alert box and work out some sort of popup situation.
So, if I decide on a popup, how can I call it using document.layers? I've used a popup script before that I like, but it uses an external .js file. Can I use document.layers to call that file?
And, if I end up deciding on an alert box after all, is there any way to include links to modern browser upgrades in the alert box, and set it so the alert only shows up once per browser session?