The instanceof operator lets scripts determine if an object (the left operand) is an instance of a known object (or inherited from the known objec

The less-than-or-equal operator compares the values of operands on either side of the operator. If the numeric value of the left operand is smaller

The less-than operator compares the values of operands on either side of the operator. If the numeric value of the left operand is smaller than the

The modulus operator divides the number to the left of the operator by the number to the right. If a remainder exists after the division, the expres

The multiplication operator multiplies the number to the left of the operator by the number to the right. Both operands must be numbers. An expressi

The new operator creates instances of the following ECMA standard static objects: Array Boolean Date Function

This is the NOT operator. This unary operator evaluates to the negative value of a single Boolean operand. The NOT operator should be used with expl

The OR operator compares two Boolean expressions for equality. If either or both expressions evaluate to true , the result of the || operator als

The strictly equals (identity) operator compares two operand values and returns a Boolean result. Both the value and data type of the two operands m

The strict-not-equals (nonidentity) operator compares two operand values and returns a Boolean result. Both the value and data type of the two opera

This is a construction that allows repeated execution of statements, usually for a controlled number of times.

This is a variation of the regular for loop that can extract the property names and values of an object. Only properties (and, in Netscape 6, meth

Provides a shortcut to execution paths for numerous conditions of an expression. The optional break statement at the end of each case block shortcuts

Refers to the current object. For example, in a form control object event handler, you can pass the object as a parameter to the function: &lt

Triggers an exception condition, passing a value along with the exception. Although the value you pass can be a simple string, ideally you should pa