> For the complete documentation index, see [llms.txt](https://doc.sysdevmobile.com/kalipso5/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.sysdevmobile.com/kalipso5/developing/form/actions/actions-description/group-controls/html-execute-jscript.md).

# HTML Execute JScript

This action executes Java Script code in the currently loaded page.

Action available for the following operating systems:

![](/files/-MIiA-ixsOr4jYdDIieF)

### Parameters

* **HTML Control** *\<unquoted string> -* The HTML control to execute the javascript code in.
* **JScript** *\<string> -* The JavaScript code to execute and to be evaluated if a return value is required.
* **Target** \<string> - The target control or variable to store the return string of the javascript code executed. The returned value must be a string. If you do not require a return value or the function executed does not have a return value, than you should leave this parameter empty, so Kalipso does not try to retrieve a return value from the execution. On some KClients trying to retrieve a return value from a function that does not return anything, can originate an Error to be triggered on the execution.

{% hint style="info" %}
This should be equivalent to executing the code inside javascript "eval()" function and the returned value the same as would be returned by that function.
{% endhint %}

{% hint style="info" %}
Your script should only contain single quotes, not double quotes.

If you really need to use double quotes, then you cannot use single quotes anywhere in your script.

Sending a script that uses both single quotes and double quotes will result in undetermined behavior.
{% endhint %}