//<!--
//ajax for aqi_map_ve.aspx and other_sites_map.aspx
function make_request(url, target_element) 
{
    var httpRequest;

    document.getElementById(target_element).innerHTML = "<p>LOADING DATA...</p>\n";
    document.getElementById(target_element).innerHTML += "<p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>";
    if (window.XMLHttpRequest) 
    { // Mozilla, Safari, ...
        httpRequest = new XMLHttpRequest();
        if (httpRequest.overrideMimeType) 
        {
            httpRequest.overrideMimeType('text/xml');
            // See note below about this line
        }
    } 
    else if (window.ActiveXObject) 
    { // IE
        try 
        {
            httpRequest = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e) 
        {
	        try 
	        {
		        httpRequest = new ActiveXObject("Microsoft.XMLHTTP");
            } 
            catch (e) {}
        }
    }

    if (!httpRequest) 
    {
        return false;
    }
    httpRequest.onreadystatechange = function() { change_content(httpRequest, target_element); };
    httpRequest.open('GET', url, true);
    httpRequest.send(null);
}

function change_content(httpRequest, target_element) 
{
    if (httpRequest.readyState == 4) 
    {
        if (httpRequest.status == 200) 
        {
            document.getElementById(target_element).innerHTML = httpRequest.responseText;
        } 
    }
}
//-->