function verificaCampo()
{
	if(document.getElementById("name").value == '')
	{
		alert("Preencha o campo Nome!");
		document.getElementById("name").focus();
		return false;
	}

	if(document.getElementById("email").value == '')
	{
		alert("Preencha o campo E-mail!");
		document.getElementById("email").focus();
		return false;
	}
	if( !validaEmail() )
	{
		alert("Digite um E-mail válido!");
		document.getElementById("email").focus();
		return false;

	}
	return true;
}

function validaEmail(){
    var mail = document.getElementById("email").value;
    var er = new RegExp(/^[A-Za-z0-9_\-\.]+@[A-Za-z0-9_\-\.]{2,}\.[A-Za-z0-9]{2,}(\.[A-Za-z0-9]{2})?/);
    if(typeof(mail) == "string"){
    	if(er.test(mail)){ 
        	return true; 
        }
    }else if(typeof(mail) == "object"){
        if(er.test(mail)){
        	return true;
        }
    }
    return false;
}

function validaOrigem()
{
	if(document.getElementById("origem").value == '')
	{
	      alert("Por favor, digite a cidade de Origem!");
	      document.getElementById("origem").focus();
	      return false;
	}
	return true;
}