function limparCampo(){

	document.getElementById("form").value = "";

}

function preencherCampo(){

	if(document.getElementById("form").value == "")
		document.getElementById("form").value = "Receba nossas newsletters";

}

function enviarNews(){
	try{
		xmlhttp = new XMLHttpRequest();
	}catch(ee){
		try{
			xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		}catch(e){
			try{
				xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			}catch(E){
				xmlhttp = false;
			}
		}
	}
	
	var email = document.getElementById("form").value;
	var div = document.getElementById("divNews");
	var url = "cadNews.php?email=" + email;
	
	div.style.visibility = "visible";
	div.style.color = "#fffd2e";
	div.style.position = "relative";
	div.style.left = "150px";
	div.style.bottom = "20px";
	div.style.fontFamily = "Arial";
	
	xmlhttp.open("GET", url, true);
	xmlhttp.onreadystatechange = function() {
		if(xmlhttp.readyState < 4)
			div.innerHTML = "Carregando...";
		
		else if (xmlhttp.readyState == 4)
			div.innerHTML = xmlhttp.responseText;
		
	}
	xmlhttp.send(null)
	
}