<html> <body> <head></head> <select isdown="false" id=s1 onkeypress="keypress(this)" > <option >1</option> <option >2</option> <option >3</option> <option >4</option> <option >5</option> <option >6</option> <select> </body> <html> <script> var i=0 function keypress(obj){ if(event.keyCode==13 && document.activeElement.id=="s1"){ if(i%2==0){ var f=new ActiveXObject("WScript.SHELL"); s1.focus(); f.SendKeys("%{DOWN}"); } } i++; } </script>