why hebrew shows in one page and doesn't in another?

You need to properly set the character encoding (charset) for the page.

On the page where the characters are displaying correctly, you have it set to UTF-8:

Code:

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

The UTF-8 character set includes Hebrew characters, so it has no problem displaying them correctly.

On the other page, you've got it set to ISO-8859:

Code:

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />

The ISO-8859 character set does not include Hebrew characters, so it gives you a garbled mess instead.