function checkemail(str){
	var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,40})\.([a-z]{2,4}(?:\.[a-z]{2})?)$/i
	return (filter.test(str))
}

function checkchars(str){
	var fukter=/\d+/i
	return (filter.test(str))
}

function getkey(e)
{
	if (window.event)
		return window.event.keyCode;
	else if (e)
		return e.which;
	else
  	 	return null;
}

function goodchars(e)
{
	var key, keychar;
	key = getkey(e);
	if (key == null) return true;
	keychar = String.fromCharCode(key);
	keychar = keychar.toLowerCase();
	goods = goods.toLowerCase();
	if (goods.indexOf(keychar) != -1)
		return true;
	if ( key==null || key==0 || key==8 || key==9 || key==13 || key==27 )
		return true;
		return false;
}