function Trim(strStr){
	return strStr.replace(/^\s+|\s+$/g,"");
}

function captcha_help(){
	var capdiv = document.getElementById("div_captcha");
	if(capdiv.style.visibility=='hidden'){
		capdiv.style.visibility = 'visible';
		setTimeout("document.getElementById('div_captcha').style.visibility = 'hidden';", 10000);
	}else
		capdiv.style.visibility = 'hidden';
}

function checkMail(mail){
    var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9])?/);
    if(typeof(mail) == "string"){
        if(er.test(mail))
			return true;
    }else if(typeof(mail) == "object"){
        if(er.test(mail.value))
			return true; 
    }else{
        return false;
    }
}
	
function validaContato(objForm){
	var conteudo = document.getElementById("divErro");	
	if(Trim(objForm.strNome.value)==''){
		conteudo.innerHTML = "Informe seu nome.";
		objForm.strNome.focus();
		return false;
	}
	if(!checkMail(objForm.strEmail.value)){
		conteudo.innerHTML = "Informe um e-mail válido.";
		objForm.strEmail.focus();
		return false;
	}
	if(Trim(objForm.strAssunto.value)==''){
		conteudo.innerHTML = "Informe um assunto.";
		objForm.strAssunto.focus();
		return false;
	}
	if(Trim(objForm.strMensagem.value)==''){
		conteudo.innerHTML = "Digite a mensagem!";
		objForm.strMensagem.focus();
		return false;
	}
	if(Trim(objForm.turing_code.value)==''){
		conteudo.innerHTML = "Informe o Código de Validação."
		objForm.turing_code.focus();
		return false;
	}
	return true;
}