var http_request = false;

//main POST function
function makePOSTRequest(script, parameters, responseFunc) {
  http_request = false;
      if (window.XMLHttpRequest) { // Mozilla, Safari,...
         http_request = new XMLHttpRequest();
         if (http_request.overrideMimeType) {
         	// set type accordingly to anticipated content type
            //http_request.overrideMimeType('text/xml');
            http_request.overrideMimeType('text/html');
         }
      } else if (window.ActiveXObject) { // IE
         try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
         } catch (e) {
            try {
               http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
         }
      }
      if (!http_request) {
         alert('Cannot create XMLHTTP instance');
         return false;
      }

  
  http_request.onreadystatechange = responseFunc;
  http_request.open('POST', script, true);
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  http_request.send(parameters);
  return "";
}

function hideResult() {
  document.getElementById("responseTextDiv").innerHTML = "";
}

//main GET function
function makeGETRequest(phpscript, parameters, targetDiv, parentTarget){
	var xmlhttp=new XMLHttpRequest();
    
	if (xmlhttp==null) {
	  alert ("Your browser does not support AJAX!");
	  return;
	} 
	
	xmlhttp.onreadystatechange= function() { 
        if (xmlhttp.readyState==4) {
           if(parentTarget) {
				ourDiv = parent.document.getElementById(targetDiv);
			}else{
				ourDiv = document.getElementById(targetDiv);
			}
			   
			   
		   ourDiv.innerHTML=xmlhttp.responseText;
		}
    }
	
	var url= phpscript;
	url=url+parameters;
	url=url+"&sid="+Math.random();
    
	xmlhttp.open("GET",url,true);
    xmlhttp.send(null);
}