You will need a font that allows you to view Hebrew.
javascript confirm box with Unicode controls
Click on the button. Assertion holds if the "W3C" is to the left of the Hebrew text.
Assertion: [Exploratory test] When Unicode directional control characters surround text to be displayed on a JavaScript confirm box, text runs on the dialog box appear in the correct order.
Notes:
This behaviour is not described by the HTML specification. The text in question is preceded by an RLE character and followed by a PDF character.