How do i use more than 1 "if" in javascript coding?

Title says it For example

if (Input.GetButtonDown ("Fire1"))
(Do Something)

And

if (Input.GetButtonDown ("Fire2"))
(Do Something Else)

So like if i do this that happens AND if i do that this happens
How would i put it in together as I cannot "function Update ()" More than once.

 

Code (csharp):

1.  
2. if (thing)
3. {
4.   do this;
5.   do this;
6.   do this;
7.   do this;
8. }
9.  
10. if (thing  otherThing)
11. {
12.    do stuff;
13. }
14.  

is and.

 

Update is called continuously once per frame, you don't continually call it, as in you never should say,

Code (csharp):

1. if (x > 1)
2.      Update();

switch statements work like

Code (csharp):

1. if(x == 1) {/*...*/}
2. if(x == 2) {/*...*/}

in a clean way:

Code (csharp):

1. var someVar : int = 0;
2. function Update() {
3. switch(someVar) {
4.     case 0:
5.     print("someVar = 0");
6.     break;
7.     case 1:
8.     print("someVar = 1");
9.     break;
10. }
11. }

 

Also,

if you don't know, || is or:

Code (csharp):

1. if(case == 0 || case ==1) {
2.      print("case = 0 or 1.");
3. }

 

Code (csharp):

1.  
2. void Update ()
3. {
4.     [COLOR="blue"]if [/COLOR](Input.GetKey (KeyCode.Mouse2)) Debug.Log ("mouse2");
5.  
6.     [COLOR="blue"]if [/COLOR](Input.GetKey (KeyCode.Mouse3)) Debug.Log ("mouse3");
7.  
8.     [COLOR="blue"]if [/COLOR](Input.GetKey (KeyCode.Mouse4)) Debug.Log (Input.mousePosition.y);
9.  
10.     [COLOR="blue"]if [/COLOR](Input.GetKey (KeyCode.Mouse5)) Debug.Log ("mouse5");
11.  
12.     [COLOR="blue"]if [/COLOR](Input.GetKey (KeyCode.Mouse6)) Debug.Log ("mouse6");
13. [COLOR="seagreen"]// the "||" sign is same as "or" so if any condition is true it will read next lines[/COLOR]
14.         [COLOR="blue"]if [/COLOR](Fileon == true [COLOR="blue"]|| [/COLOR]Editon == true [COLOR="blue"]|| [/COLOR]MapSize == true [COLOR="blue"]|| [/COLOR]Settings == true [COLOR="blue"]|| [/COLOR]Helpon == true [COLOR="blue"]|| [/COLOR]Exiton == true [COLOR="blue"]|| [/COLOR]Saveon == true [COLOR="blue"]|| [/COLOR]Loadon == true) enablebuilding = false;
15.     [COLOR="blue"]else [/COLOR]enablebuilding = true;
16. [COLOR="seagreen"]// the "" sign is same as "and" so if all conditions are true it will read next lines[/COLOR]
17.     [COLOR="blue"]if [/COLOR](Input.GetMouseButtonDown(0) [COLOR="blue"] [/COLOR]Input.GetKey (KeyCode.LeftShift) == false [COLOR="blue"] [/COLOR]Input.mousePosition.y > Screen.height/5+5 [COLOR="blue"] [/COLOR]Input.mousePosition.y < Screen.height-40 [COLOR="blue"] [/COLOR]toolmainInt==0 [COLOR="blue"] [/COLOR]enablebuilding == true)
18.     {
19.              Debug.Log ("BLA BLA BLA");
20.     }
21. }
22.  

if this doesn't explains then sry...

 

Code (csharp):

1. if(explains == false) {
2.      i_am_sorry = true;
3. }