Variable determined by host name?

[msmith29063]

Is this the correct syntax?

// Determine domain used to access site
if (top.location.host.indexOf('.com')) {
var DefaultURL = 'http://www.sitename.com';
}
if (top.location.host.indexOf('.org')) {
var DefaultURL = 'http://www.sitename.org';
}

I need assign this variable based on how the site was accessed -- either .org or .com. Thank you for your help!

[msmith29063]

Thanks, Dave. I wasn't gonna bug you with this issue. But thanks for the help! You've been great. I've really learned a lot!