===(Identity) : Relational Operators « Operators « JavaScript Tutorial

The identity operator compares the first operand to the second operand.

If the value on the left is equal to the value on the right side of the operator, true is returned from operation.

If the values are not equal, false is returned.

No type-conversion is performed on the operands before the comparison is made.

    <script language="JavaScript">
      document.write("The string 326 is NOT equal to the number 326");
      document.write("The string 326 is EQUAL to the number 326");

2.9.Relational Operators
2.9.1.Equal and Not Equal
2.9.2.Equal Operator
2.9.3.A Comparison Operator returns boolean variable
2.9.4.!= (Not Equal)
2.9.5.Identically Equal and Not Identically Equal
2.9.6.not identically equal operator
2.9.7.!== (Non-Identity)
2.9.8.< (Less Than)
2.9.10.> (Greater Than)
2.9.11.>= (Greater Than or Equal)