Problem with Quick Cart. No way to define cart page?

I had to delete the Go To URL behaviour first, in the behaviours panel, and then recreate it and it seems to have done the trick now.

Why isn't it possible to specify the basket page in the Display Manager settings when inserting a Quick Cart? Without specifying a page, it makes the "View Cart" button redundant / inoperable, doesn't it?

This is the new code above the head...

<script type="text/JavaScript">
<!--
function MM_goToURL() { //v3.0
var i, args=MM_goToURL.arguments; document.MM_returnValue = false;
for (i=0; i<(args.length-1); i+=2) eval(args[i]+".location='"+args[i+1]+"'");
}
//-->
</script>

...and this is the new button code:

<input name="spCART_View_100" type="image" id="spCART_View_100" onclick="MM_goToURL('plugins/parent','view-basket.asp');return document.MM_returnValue" src="heather-plants/btn-basket-off.png" alt="View Cart" />

So it looks like we just needed to add 'return document.MM_returnValue' in the onclick parameter to get it working.

Thanks for helping out with that. I just couldn't see what the issue was.
Regards
Nath.