function NewHttpReq() { 
    var httpReq = false; 
    if (typeof XMLHttpRequest!='undefined') { 
        httpReq = new XMLHttpRequest(); 
    } else { 
        try { 
            httpReq = new ActiveXObject("Msxml2.XMLHTTP.4.0"); 
        } catch (e) { 
            try { 
                httpReq = new ActiveXObject("Msxml2.XMLHTTP"); 
            } catch (ee) { 
                try { 
                    httpReq = new ActiveXObject("Microsoft.XMLHTTP"); 
                } catch (eee) { 
                    httpReq = false; 
                } 
            } 
        } 
    } 
    return httpReq; 
} 
 
function DoRequest(httpReq,url,param) { 
 
    // httpReq.open (Method("get","post"), URL(string), Asyncronous(true,false)) 
 
    httpReq.open("POST", url, false); 
    httpReq.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); 
    httpReq.send(param); 
    if (httpReq.status == 200) { 
        return httpReq.responseText; 
    } else { 
        return httpReq.status; 
    } 
} 


 function price_change(){
   
    var b=document.getElementById("alevel");
    var c=document.getElementById("urgency");    
    var d=document.getElementById("price");
    var e=document.getElementById("pages");
    var myRequest = NewHttpReq();     
   
    var result = DoRequest(myRequest,'_order.php',"price=1&alevel="+b.value+"&urgency="+c.value);     
    d.innerHTML=" Price per page: "+result;
    
 }