//Check if user pressed enter and click the button
function checkenter(myfield,e, buttonId)
{
	var keycode;
	if (window.event) keycode = window.event.keyCode;
	else if (e) keycode = e.which;
		else return true;
	if (keycode == 13)
	{
		document.getElementById( buttonId ).click();
		return false;
	}
	else
		return true;
}