var ajaxreq=false;
var ajaxCallback;

function ajaxRequest(filename){
	
    
    try{
    	ajaxreq= new XMLHttpRequest();
    } 
    catch (error) {
    	try{
        	ajaxreq= new ActiveXObject("Microsoft.XMLHTTP");
       	} 
        catch (error) {
        	return false;
        }
    }
    ajaxreq.open("GET",filename);
    ajaxreq.onreadystatechange=ajaxResponse;
    ajaxreq.send(null);
    
}
   

function ajaxResponse(){
	if(ajaxreq.readyState ==1){document.getElementById('sometext').innerHTML = "...requesting";}
    if(ajaxreq.readyState ==2){document.getElementById('sometext').innerHTML = "...loading";}
    if(ajaxreq.readyState ==3){document.getElementById('sometext').innerHTML = "...loading";}
    if(ajaxreq.readyState !=4) return;
    if(ajaxreq.status==200){
    	document.getElementById('sometext').innerHTML = "";
        
        if(ajaxCallback) ajaxCallback();
       
        	
   
    }
    else alert ("Request failed");
    return true;
}