The length property contains the number of Form objects that are in the forms[] array.
<html> <form name="Form1"> <input type="button" value="Green" onClick = "document.bgColor='green'"> </form> <form name="Form2"> <input type="button" value="Blue" onClick = "document.bgColor='blue'"> </form> <script language="JavaScript"> <!-- document.write(document.forms.length," Form objects in document."); --> </script> </html>