Weird, if I try to alert out c, I get a "native code" output that makes me think I have the proper function reference.
If I try something like:
javascript:c="abcde".charCodeAt;for(i=0;i<5;i++)alert(i+":"+c(i))
Firefox 3.6 and IE8 both give: 91, 111, 98, 106, 101 (instead of 97-101)...