Not sure I understand here. You are talking about a web-page that you open in up DW, right? And the exact same web-page, no modifications at all, read right-to-left (rtl) at one point, and thel left-to-right, at another? That doesn't sound possible.

As I understand it, the direction of text is controlled by certain tags and attributes in the tags, not by DW or any other browser - so I can't see how what you're describing is possible. There must be a difference between the page you looked at before, and the page you're looking at now.

Hello,

Thanks for replying and sorry if i was not clear!

Well, the page looks fine in the browser IE7 & firefox, but in dreamweaver, the arabic characters and shown from right to left i mean every charater in every word is written from right to left!

and same if i copy and paste new arabic in the dreamweaver document!

hm, well that one's beyond me then. Again, I'd read up on "rtl" tags.
For example:
[fr.wikipedia.org...]
[w3.org...]
[mac.plonter.co.il...]

Thanks, but its dreamweaver issue not the web site!

Yes, I understood - but my bet is that the rtl attributes are not correctly set, and that the browser is being nicer about it than DW