function gera_ajax(){
try{ ajax=new XMLHttpRequest(); }
catch(ee){
    try{ ajax=new ActiveXObject("Msxml2.XMLHTTP"); }
	catch(e){
        try{ ajax=new ActiveXObject("Microsoft.XMLHTTP"); }
		catch(E){ ajax=false;}}} return ajax; }

function paginas(pg){
		var conteudo=document.getElementById('conteudo'); 
		var n=Math.random();
		var ajax=gera_ajax();
		ajax.open("GET","query.php?pagina="+pg+"&n="+n,true);
		ajax.onreadystatechange=function(){
			if(ajax.readyState==4 && ajax.status==200){ conteudo.innerHTML=unescape(ajax.responseText); }
			else{ conteudo.innerHTML="<br><br><center><br><font color='#000000' style=\"font-family:Tahoma, Verdana, Arial; font-size:11 px;\"><b>Carregando...</b></font></center>";	}}
		ajax.send(null); }