|Argument list:||aCondition||A condition that tests true or false|
|someCode1||Code to be executed if the condition tests true|
|someCode2||Code to be executed if the condition tests false|
This is an optional additional statement that can be added to an if() condition test to allow for some alternative code to be executed when the condition tests false. The true case will cause the first block of code to be executed, the false case will execute the second (that which follows the else keyword).
ECMA 262 edition 2 - section - 12.5
ECMA 262 edition 3 - section - 12.5