function isEmail(str)
{
	var supported = 0;
	if (window.RegExp) {
		var tempStr = "a";
		var tempReg = new RegExp(tempStr);
		if (tempReg.test(tempStr)) supported = 1;
	}
	if (!supported) 
		return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
	var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
	var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
	return (!r1.test(str) && r2.test(str));
}

function isNumber(numero)
{
   var CaractereInvalido = false;
   for (i=0; i < numero.length; i++){
      var Caractere = numero.charAt(i);
      if(Caractere != "." && Caractere != "," && Caractere != "-"){
         if (isNaN(parseInt(Caractere))) CaractereInvalido = true;
      }
   }

   return !CaractereInvalido;
}

function isDate(dia,mes,ano){
	var now = new Date();
	var MaxAno = now.getYear();
	if ((eval(dia) > 31) || (eval(mes) > 12) || (eval(ano) > MaxAno) || (eval(ano) < 1900))	{
		return false;
	}
	if((eval(mes) == 1) || (eval(mes) == 3) || (eval(mes) == 5) || (eval(mes) == 7) || (eval(mes) == 8) || (eval(mes) == 10) || (eval(mes) == 12))	{
		if(eval(dia) > 31)	{
			return false;
		}				
	}
	
	if((eval(mes) == 4) || (eval(mes) == 6) || (eval(mes) == 9) || (eval(mes) == 11))	{
		if(eval(dia) > 30)		{
			return false;
		}
	}
	
	if(eval(mes) == 2)	{
		var MaxDia = 0
		if(eval(ano) % 4 == 0)		{
			MaxDia = 29
		} else {
			MaxDia = 28
		}
		if(eval(dia) > MaxDia)		{
			return false;
		}
	}
	return true;
}