Microsoft® JScript®  Operator 
Language Reference Version 1

Performs a bitwise OR on two expressions.
result = expression1  expression2The  operator syntax has these parts:
Part Description result Any variable. expression1 Any expression. expression2 Any expression.
The  operator looks at the binary representation of the values of two expressions and does a bitwise OR operation on them. The result of this operation behaves as follows:Any time either of the expressions has a 1 in a digit, the result will have a 1 in that digit. Otherwise, the result will have a 0 in that digit.0101 (expression1) 1100 (expression2)  1101 (result)For information on when a runtime error is generated by the  operator, see the Operator Behavior table.