function objetoAjax(){
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 SearchList(lat,lon) {
divResultado = document.getElementById('list_canvas');
ajax=objetoAjax();
ajax.open("GET", '/ajax/list.php?lat='+lat+'&lon='+lon);
ajax.onreadystatechange=function() {
	if (ajax.readyState==4) {
	divResultado.innerHTML = ajax.responseText
	}
}
ajax.send(null)
}