Change the value of the formtarget attribute of a submit button:
document.getElementById("mySubmit").formTarget = "_self";
This example contains a form with a submit button that submits the form to a new window:
Click on button to change the value of the formtarget attribute of the submit button.
<!DOCTYPE html> <html> <body> <form action="/action_page.php" method="get"> First name: <input type="text" name="fname" value="CSS"><br> Last name: <input type="text" name="lname" value="HTML"><br> <input type="submit" id="mySubmit" value="Submit" formtarget="_blank"> </form>/* w w w. j a va 2s . c o m*/ <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("mySubmit").formTarget = "_self"; document.getElementById("demo").innerHTML = "The value of the formtarget attribute was changed from '_blank' to '_self'."; } </script> </body> </html>