var

stop_symbols = ' 0987654321 -)(+';

num_symbols = ' 0987654321';

function CheckMail()
{
       var chk=0;
       if((document.mainform.Mail.value)==0)
       {
	   alert ("\nНе заполнено поле:\nВаш e-mail\n");
           chk=1;
       }else
       if(document.mainform.Mail.value.indexOf('@')==-1)
       {
           alert ("\nНекорректный e-mail\n");
           chk=1;
       }
       if(chk==0)
       {
		return true;
       }else
       {
                return false;
       }
}

function check(input) {
	var ok = true;

	for (var i = 0; i < input.length; i++)
	{
		var chr = input.charAt(i);
		var found = false;
	for (var j = 0; j <= stop_symbols.length; j++)
	{
		if (chr == stop_symbols.charAt(j)) found = true;
	}
	if (!found) ok = false;

	}
	return ok;
}
function checkN(input) {
	var ok = true;

	for (var i = 0; i < input.length; i++)
	{
		var chr = input.charAt(i);
		var found = false;
	for (var j = 0; j <= num_symbols.length; j++)
	{
		if (chr == num_symbols.charAt(j)) found = true;
	}
	if (!found) ok = false;

	}
	return ok;
}