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execScript method (window)

Browser support:

Executes the specified script in the specified language.

This method can be useful if you want to execute a script written in another scripting language from JavaScript, but it can also be useful when you have a JavaScript code as a string.

If you need to execute a string of JavaScript code, use the Function object or the eval method for cross-browser functionality.

Syntax:

object.execScript (code, language);

You can find the related objects in the Supported by objects section below.

Parameters:

code

Required. String that specifies the code to be executed.

language

Required. String that specifies the scripting language. This parameter is not case sensitive.

One of the following values:

JavaScript

Default in Google Chrome. The language is JavaScript.

JavaScript1.1

The language is JavaScript 1.1.

JavaScript1.2

The language is JavaScript 1.2.

JavaScript1.3

The language is JavaScript 1.3.

JScript

Default in Internet Explorer. The language is Microsoft JScript.

VBS

Same as VBScript

VBScript

The language is Microsoft Visual Basic Scripting Edition.

Return value:

Always returns null.

Example HTML code 1:

This example illustrates the use of the execScript method:

<head>
    <script type="text/javascript">
        var jsCode = "alert ('Execution is completed.');";
        if (window.execScript) {        // Internet Explorer and Google Chrome
            execScript (jsCode, "JavaScript");
        }
        else {
            if (window.eval) {
                // the script language  is always JavaScript for the eval method
                eval (jsCode);
            }
        }
    </script>
</head>

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Example HTML code 2:

This example is the same as the previous one, but is uses the cross-browser Function object to execute a string of JavaScript code:

<head>
    <script type="text/javascript">
        var jsCode = "alert ('Execution is completed.');";
        (new Function (jsCode)) ();
    </script>
</head>