# screenPop() for Salesforce Classic
## Usage
Pops to a target URL, which must be relative.
## Syntax
```javascript
sforce.interaction.screenPop(url:string, force:boolean, (optional) callback:function)
```
## Arguments
| 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. |
## Sample Code–JavaScript
```javascript
```
## Response
| 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. |