function autotab(what,e,max,action)
{
   if (document.layers) 
	{
		if (e.target.value.length >= max && e.which != 9 && e.which != 0)
			eval(action);
	}
	else if (document.all) 
	{
		if (what.value.length > (max-1) && 
			window.event.keyCode != 9 && 
			window.event.keyCode != 16 && 
			window.event.keyCode != 37 && 
			window.event.keyCode != 39 )
			eval(action);
	}
}