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Here's an example of a simple function containing an argument which will be defined as a text string, then uses document.write() to write the value of the argument to this document. Since the write statement is within a function, we need to open and close the stream.

function writing(myString) {   //declare argument to be used

alert(myString);

document.open();   //open the stream

document.write(myString);   // here is where argument is used

document.close();   //close the stream

}

The argument is named "myString" and is defined when the function is called: from within the form button's onClick event handler.

<form>
<input type="button" onClick="writing( ' Hello World! ' )" value="Hello World!">
</form>

The function's first statement is an alert that shows the value of the "myString" variable. Since the alert statement comes before the write statement, we'll see it first.

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