function choix(idBox)
{
	theme = idBox.value;
	fichier = "searchTheme.php?idTheme="+theme;

	if(window.XMLHttpRequest) // FIREFOX
	{
		xhr_object = new XMLHttpRequest();
	}
	else if(window.ActiveXObject) // IE
	{
		xhr_object = new ActiveXObject("Microsoft.XMLHTTP");
	}
	else
	{
		return(false);
	}
	xhr_object.open("GET", fichier, false);
	xhr_object.send(null);
	if(xhr_object.readyState == 4)
	{
		boiteSelect = xhr_object.responseText;
	}
	else
	{
		boiteSelect = false;
	}
	document.getElementById("cadre_sous_theme").innerHTML = boiteSelect;
}