Evaluates the value of the first expression, then the second expression, and returns the value of the second expression.
Syntax
expressionA, expressionB
Example
for (var i=0, j=9; i <= 9; i++, j--)
document.write("a["+i+","+j+"]= " + a[i,j]) // Increments the i and j variables at the same time.
Remarks
Use a comma to evaluate two expressions at the same time.