screenPop() for Salesforce Classic

Pops to a target URL, which must be relative.

Name	Type	Description
`url`	string	A relative URL, which specifies the location of the screen pop.
`force`	boolean	Set value to `true` to force a screen pop, `false` otherwise. This argument is only available in API version 28.0 and later.
`callback`	function	JavaScript method executed when the API method call is completed.

Name	Type	Description
`result`	boolean	`true` if the screen pop was successful, `false` if the screen pop wasn’t successful.
`error`	string	If the API call was successful, this variable is undefined. If the API call failed, this variable returns an error message.