var http_request = false;
   var request_file = 'ajax_point.php';
   function makePOSTRequest(url, parameters, divid) {
      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 =    function alertContents() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById(divid).innerHTML = result;            
         } else {
            alert('There was a problem with the request.');
         }
      }
   }
      http_request.open('POST', url, 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);
   }


   
   function get(obj, divid) {
	var numel = document.forms[obj].length;
	var pstr = 'act='+divid;
   for (var i=0; i<numel; i++){
	fid = document.forms[obj].elements[i].id;
	fval = document.forms[obj].elements[i].value;
	pstr = pstr+'&'+fid+'='+encodeURI(fval);
   }
      makePOSTRequest(request_file, pstr, divid);
   }