You will need a font that allows you to view Hebrew.
javascript prompt box with Unicode controls
Click on the button. Assertion holds if the "W3C" is to the left of the Hebrew text:
A. on the dialog box chrome
B. in the initial prompt box.
Assertion: [Exploratory test] When Unicode directional control characters surround text to be displayed on a JavaScript prompt box, (a) text runs on the dialog box chrome, and (b) text runs for the initial prompt 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.