function nouAjax(){
	var xmlhttp=false;
 	try {
 		xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
 	} catch (e) {
 		try {
 			xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
 		} catch (E) {
 			xmlhttp = false;
 		}
  	}

	if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
 		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}



function consultaAjax(str_valors, capa_resposta, url, redirect){
	
		if(!url){url = 'consultesAjax.php';}
		if(capa_resposta){capa = document.getElementById(capa_resposta);}else{capa = null;}
	ajax=nouAjax();
	ajax.open("POST", url, true);
	
	ajax.onreadystatechange=function() {
		if (ajax.readyState==1) {
			if(capa){
            capa.innerHTML = "<div class='a_centre' style='padding-top:20px;'><img src='img/ajax-carregant2.gif'></div>" +
			"<div class='a_centre x_per_sobre blanc'>Carregant...</div>";
			}
        }else if (ajax.readyState==4) {
			if(capa){
			capa.innerHTML = ajax.responseText;
			}
	 	}
	}
	ajax.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
	ajax.send(str_valors);
	
}