// JavaScript Document

function abrirPag(arquivo){
	   var xmlHttp;
	   try {
					   // Firefox, Opera 8.0+, Safari
					   xmlHttp=new XMLHttpRequest();
	   }
	   catch (e) {
					   // Internet Explorer
					   try {
									  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
					   }
					   catch (e){
									  try {
													  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
									  } 
									  catch (e) {
													  alert("Seu navegador não suporta AJAX.");
													  return false;
									  }
					   }
	   }
xmlHttp.onreadystatechange=function() {
					   if(xmlHttp.readyState == 1) {
									  document.getElementById("conteudo_mostrar").innerHTML = "<p>&nbsp;</p><p>&nbsp;</p><center>Carregando...<p>&nbsp;</p><img src='img/loader.gif'></center>";
					   }
					   if(xmlHttp.readyState == 4) {
									  document.getElementById("conteudo_mostrar").innerHTML = xmlHttp.responseText;
					   }
}
xmlHttp.open("GET",arquivo,true);
xmlHttp.send(null);
}