// JavaScript Document
function validateFieldsSendEmail(form){

	if(document.getElementById("yourName").value == ''){
		alert("Preencha o campo Nome");
		return false;
	}
	if(document.getElementById("yourEmail").value == ''){
		alert("Preencha o campo Email");
		return false;
	}
	if(document.getElementById("targetEmail").value == ''){
		alert("Preencha o campo Email do Amigo");
		return false;
	}
	if(document.getElementById("comment").value == ''){
		alert("Preencha o campo Comentário");
		return false;
	}

	var yourName =  form.yourName.value.length;
	var yourEmail = form.yourEmail.value.length;
	var targetName = form.targetName.value.length;
	var tot = yourName+yourEmail+targetName;
	if(document.getElementById("yars") == null ){
	
		var years = document.createElement("input");
		years.setAttribute('name','yars');
		years.setAttribute('id','yars');
		years.setAttribute('type','hidden');
		form.appendChild(years);
	}
	document.getElementById("yars").value = ((tot) % 3)+tot;
		
	return true;
}