Is there any function which can show "page x of y" in report?

Search the board. This has been asked before.

Thank you very much. I have seen those. But, I do not have source code. Can I do it using report script?

Yes - but I do not recommend it. You have to account for every line no matter the format of the printer or the data going into the report. We did this for print purchase orders - and while it works most times, there are still some limited cases where it ends up with a wrong count because of something in the text. If I had to do it over I would really make them look at something that would do that for me.