menu issues with Mac but not PC

[kcraig]

I'm new to the forums and am self-taught on HTML. I've been learning JavaScript and CSS, but still very new to that. I'm developing a website and just rolled out the new version about a month ago. I was informed today that the website has issues on Macs. I have one Mac available to me, which uses Safari, and there are definitely issues going on. Someone also viewed it in Firefox on their Mac and noticed the same things.

Issues...I think it's mostly the menu that's causing it. Things aren't positioned correctly. The menu flickers and isn't quite organized correctly when the multi-levels open.

I am using the JQuery Slide Menu (.js and .css files) from DynamicDrive.com. The website is developed using an older version of FrontPage and, other than the menu, is HTML-based.

Like I said at the beginning, I'm self-taught, and I don't really know how to fix this.

Any recommendations?

Thanks!

[edited by: tedster at 8:26 pm (utc) on April 14, 2009]
[edit reason] removed specifics about the site [/edit]

[tedster]

Hello kcraig, and welcome to the forums.

Before you try to fix a cross-browser display problem, you should make sure that your mark-up is valid. Trying to fix a cross-browser issue when the code isn't valid can be an impossible task.

W3C Validator - HTML [validator.w3.org]
W3C Validator - CSS [jigsaw.w3.org]