function getXmlHttp() {
var xmlhttp;
try{
 xmlhttp = new XMLHttpRequest();
}catch(ee){
 try{
  xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
 }catch(e){
  try{
   xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  }catch(E){
    xmlhttp = false;
  }
 }
}
return xmlhttp;
} 
/**************/

var request = getXmlHttp();

function cadastra(){
  var nm = document.getElementById('txt_nome').value;
  var se = document.getElementById('txt_email').value;
  var url= "cadastra_newsletter.php?txt_nome="+nm+"&txt_email="+se;
   request.open('GET', url, true);
  request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  request.onreadystatechange = confirma;
  request.send(null);
}

function confirma(){

  if(request.readyState == 4){
    var response = request.responseText;
    var divmain = document.getElementById('div_cadastro');
    var formid = document.getElementById('frm_newsletter');
    var pelement = document.createElement("p");
    var pula = document.createElement("<br>");	
	pelement.appendChild(pula); 
    var centraliza = document.createElement("<center>");	
	pelement.appendChild(centraliza); 	
    var text = document.createTextNode("Parabéns " + response + ", cadastro realizado com sucesso!");
    pelement.appendChild(text);
    divmain.replaceNode(pelement,frm_newsletter);

/*    
	var ael = document.createElement("a");
    var pula = document.createElement("<br>");
    var textlink = document.createTextNode("voltar");
    
    ael.appendChild(textlink); 
    ael.setAttribute("href","Cadastro.html");
    pelement.appendChild(pula); 
    pelement.appendChild(ael); 
*/	

   }
  }