You can place debugger statements anywhere in procedures to suspend execution. Using the debugger statement is similar to setting a breakpoint in the code.

The debugger statement suspends execution, but it does not close any files or clear any variables.

Note:
The debugger statement has no effect unless the script is being debugged.

This example uses the debugger statement to suspend execution for each iteration through the for loop.

Note:
To run this example, you must have a script debugger installed and the script must run in debug mode. Internet Explorer 8 includes the Microsoft JScript debugger. If you are using an earlier version of Internet Explorer, see How to: Enable and Start Script Debugging from Internet Explorer.

for(i = 1; i<5; i++) {
   // Print i to the Output window.
   Debug.write("loop index is " + i);
   // Wait for user to resume.
   debugger
}

Version 3

Concepts

Reference