'Confirm Window' Code not working

[mickeymouse 0]

I'm Baffled.  My code (as far as I can see) matches W3 School tutorial example but it doesn't work.

My button to go to the function doesn't react (it does if I remove my red text code.

"function myDelDB()
{var r = Confirm('Delete');
if (r==true)
    {location.href='CAS_RoulDeleteDB.php'; return false;
    window.open(location.href); return false;}
else{return false;}
}"

[justsomeguy 1,135]

Check your browser console for error messages, you'll see that "Confirm" is not defined.