The NEGATIVE_INFINITY property represents a negative infinity number.
It is returned when a calculation returns a negative number greater than the largest negative number in JavaScript.
<html> <body> <script language="JavaScript"> <!-- if((Math.sqrt(-2)) != Number.NEGATIVE_INFINITY_){ document.write("This is not equal to NEGATIVE_INFINITY"); } else{ document.write("This is equal to NEGATIVE_INFINITY"); } --> </script> </body> </html>