function numbersonly(myfield, e, dec)
	{
		
	var key;
	var keychar;
	if (window.event)
		key = window.event.keyCode;
	else if (e)
		key = e.which;
	//else
	//return true;
	keychar = String.fromCharCode(key);
	
	// control keys
	if 
	((key==null)	|| 
	(key==0) 		|| 
	(key==8) 		||
	(key==9) 		|| 
	(key==13) 		|| 
	(key==27) )
	return true;
	
	// numbers
	else if ((("0123456789").indexOf(keychar) > -1))
	return true;
	
	// decimal point jump
	else if ((keychar == "."))
	{
	//myfield.form.elements[dec].focus();
	return true;
	}
	else
	return false;
}