The watch() method watches for the event in which a property gets assigned a value.
When the assignment is made, a user defined function is executed.
The method itself takes the property to watch, prop, and the function to call, func, when the event occurs.
<html> <body> <title>Example of the watch method</title> <script language="JavaScript"> <!-- function inform(){ document.write("Tmp variable changed from 1 to 3"); } var tmp = 1;