function getPage(elemento,pagina,categoria){
	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();  }
	
	xmlhttp.open('GET', pagina , true); 
	if (navigator.userAgent.indexOf("MSIE") < 0 ) {
		xmlhttp.overrideMimeType("text/html; charset=ISO-8859-1");
	} else {
		xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
		xmlhttp.setRequestHeader("Content-Type","text/html; charset=ISO-8859-1");
	}
	xmlhttp.onreadystatechange=function() {
        if (xmlhttp.readyState==4) { 
            var content = xmlhttp.responseText; 
            if( content && elemento != null ){ document.getElementById(elemento).innerHTML = content; }
        }
	}

	xmlhttp.send(null)
	return;

}