Tryit Editor v1.8

Source Code:
<!DOCTYPE html> <html> <head> <script> function open_win() { window.open("../default.htm","_blank","toolbar=yes, location=yes, directories=no, status=no, menubar=yes, scrollbars=yes, resizable=no, copyhistory=yes, width=400, height=400"); } </script> </head> <body> <form> <input type="button" value="Open Window" onclick="open_win()"> </form> </body> </html>
Result:
W3Schools.com - Try it yourself