Alternative JavaScript switch case writing

I am used to the C # syntax. In the case of multiple branch calls, except for the simplest if-else, it is switch-case, therefore, when using JavaScript, it is easy to write the following code:
Copy codeThe Code is as follows:
// JScript source code
// Something values are 1, 2, and 3...
Switch (something ){
Case 1:
TodoA ();
Break;
Case 2:
TodoB ();
Break;
Case 3:
TodoC ();
Break;
//...
}

The code itself is nothing, but the readability is poor and it looks a little difficult. Although JavaScript supports switch-case, there is a better way to write it:
Copy codeThe Code is as follows:
// JScript source code
// Something values are 1, 2, and 3...
Var cases = {
1: todoA,
2: todoB,
3: todoC
};
If (cases [something]) {
Cases [something] ();
}

Author: Justin
Source: http://justinw.cnblogs.com/