function ajaxInit() {
    var req;
    
    try {
 req = new ActiveXObject("Microsoft.XMLHTTP");
    } catch(e) {
 try {
     req = new ActiveXObject("Msxml2.XMLHTTP");
 } catch(ex) {
     try {
   req = new XMLHttpRequest();
     } catch(exc) {
   alert("Esse browser não tem recursos para uso do Ajax");
   req = null;
     }
 }
    }
    
    return req;
}

function maisPosts(qtd) {
	  var div = document.getElementById('maispost');
	  var nomeBotao = "botao"+qtd;
	  document.getElementById(nomeBotao).style.display = 'none';
      var divAntiga = document.getElementById('maispost').innerHTML;  
      
      if(qtd != ""){
    	  	 
	      var url = "include/funcoes.php?op=mostra_posts&qtd=" + qtd ;
	      
	    	 
	      ajax = ajaxInit();
	      if(ajax) {
	    	ajax.open("GET", url, true);
	    	ajax.setRequestHeader('Content-type','application/x-www-form-urlencoded; charset=iso-8859-1');
	    	 ajax.onreadystatechange = function() {
		        if (ajax.readyState==1){
		     	//div.innerHTML = "<img src='images/ajax-loader.gif'/>"; 
		        }
		        if(ajax.readyState == 4) {
		        	resul = ajax.responseText;
		        	if(resul!=''){
		        		div.innerHTML = divAntiga + resul; 
		        	}else{
		        		div.innerHTML = "";
		        	}
		        }
	        }
	        ajax.send(null);
	      }
	      
      }
      
}