How do I pass the VALUE property of the EDITBUTTON from a JavaScript function?

<p>I hope you can help. Tried to paste the code in, but didn't work. </p> <ul> <li>I created a JavaScript function to read the selected option from the &lt;Select&gt; dropdown.</li> <li>I need to pass the value of the function to the VALUE property of the EDITBUTTON.</li> </ul> <p><strong>EditButton<br></strong>ID="btn_EditRegReview"<br>Text="Review App"<br>Form="OPAForm_RegionReview" </p> <p><strong>Parameter<br></strong>Name="OPAReviewID" Value='[[setOPAReviewID()]]' </p> <p><br> </p>