function valida(){
	var arrayEl = new Array();
	var erros = 0;
	
	el = $('nome');
	if(el.value == "")
	{
		erros++;
		el.style.border = "1px #B00 dashed";
		el.style.background = "#FEE";
	}
	else
	{
		el.style.border = "1px #7F9DB9 solid";
		el.style.background = "#FFF";
	}
	
	el = $('email');
	if(el.value == "")
	{
		erros++;
		el.style.border = "1px #B00 dashed";
		el.style.background = "#FEE";
	}
	else
	{
		if(!(/[\w0-9]\-{0,1}[\w0-9]?@[\w0-9-].[\w][\w.]?/.test(el.value))){
			erros++;
			el.style.border = "1px #B00 dashed";	
			el.style.background = "#FEE";
		}else{
			el.style.border = "1px #7F9DB9 solid";
			el.style.background = "#FFF";
			if($('poster1').checked){
				$('obrigado').value = 'obrigado.php?cad=1&mail=' + el.value;
			}else{
				$('obrigado').value = 'obrigado.php?cad=1';
			}
		}
	}

	
	if(erros > 0){
		alert("Os campos em 'vermelho' precisam ser preenchidos.");
		return false;
	}
	
	return true;
}