function createRequestObject() // Requetes AJAX
{
    var http;
    if(window.XMLHttpRequest)
    { // Mozilla, Safari, ...
        http = new XMLHttpRequest();
    }
    else if(window.ActiveXObject)
    { // Internet Explorer
        http = new ActiveXObject("Microsoft.XMLHTTP");
    }
    return http;
}
function soleil()
{
    var lieu = document.solar.elements['lieu'].options[document.solar.elements['lieu'].options.selectedIndex].value;
    var surface =document.solar.elements['surface'].options[document.solar.elements['surface'].options.selectedIndex].value;
    var orientation = document.solar.elements['orientation'].options[document.solar.elements['orientation'].options.selectedIndex].value;
    http = createRequestObject();
    http.open('get', 'http://www.sunelis.com/wp-content/themes/sunelis/solar.php?lieu=' + lieu + '&surface=' + surface  + '&orientation=' + orientation, true);
    http.onreadystatechange = affichage;
    http.send(null);
}
function affichage()
{
    if(http.readyState == 4)
    {
        if(http.status == 200)
        {
        	if(http.responseText != 'null')
        	{
        		document.getElementById('solarform').style.display = "none";
        		document.getElementById('solarresult').innerHTML = http.responseText;
        	}
        }
    }
}