var tXHRastro=null;
function Get_Astro(what){
	if(tXHRastro!=null) tXHRastro.abort();
	try{
		tXHRastro=getXMLHttpRequest();
		var url="/astronomy/get_sunrise.php";
		var params="cle="+what;
		tXHRastro.open("POST", url, true);
		tXHRastro.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
		tXHRastro.onreadystatechange =null;
		tXHRastro.send(params);
	}catch(e){};
	return false;
}