VbScript to Javascript Math Problem

Can anyone tell me why when I convert this vbscript code to javascript I get infinity rather than 0.876794146362291?

VbScript:
GetBase = (1 - (1 + 0.00583333333333333) ^ -360)
Results to 0.876794146362291

Javascript:
Math.pow(1 - (1 + 0.00583333333333333), -360);
Results to Infinity

If you want them to be equivalent rewrite it like this:

1 - Math.pow(1 + 0.00583333333333333, -360);

BaldEagle

Thanks