I can't get NS 4.7 to update multiple frames on a macintosh.

The JS is working fine on Netscape 4.7, MSIE on a PC, aswell on MSIE on a 
mac.

<SCRIPT LANGUAGE=JAVASCRIPT TYPE "TEXT/JAVASCRIPT">
<!-- Hide Script from old browsers

function loadFrames(num1, num2, num3) {
	parent.LEFT_FRAME.document.location = "left" + num1 + ".html"
	parent.RIGHT_FRAME.document.location = "right" + num2 + ".html"
	document.location = "top" + num3 + ".html"
		}
// End hidding script from old browsers -->
</SCRIPT>

Help!