function phonemask(t)
	{
		var patt1 = /(\d{3}).*(\d{3}).*(\d{4})/;
		var patt2 = /^\((\d{3})\).(\d{3})-(\d{4})$/;
		var str = t.value;
		var result;
		if (!str.match(patt2))
		{
			result = str.match(patt1);
			if (result!= null)
			{
				t.value = t.value.replace(/[^\d]/gi,'');
				str = '(' + result[1] + ') ' + result[2] + '-' + result[3];
				t.value = str;
			}
			else
			{
				if (t.value.match(/[^\d]/gi))
				t.value = t.value.replace(/[^\d]/gi,'');
			}
		}
	}