var http_request = false;
   var kamchci = 'myspan';
   function makePOSTRequest(url, parameters, kam) {
      http_request = false;
      kamchci = kam;
      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 = alertContents;
      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 alertContents(kam) {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(kamchci+http_request.responseText);
            result = http_request.responseText;
            document.getElementById(kamchci).innerHTML = result;            
         } else {
            //alert(http_request.responseText);
            alert('There was a problem with the request.');
         }
      }
   }
   
   function get(url, kam, co, co2) {
      var poststr = "param=" + encodeURI( document.getElementById(co).value) +
                    "&param2=" + encodeURI(co2);
      makePOSTRequest(url, poststr, kam);
   }

   function getparam(url, kam, co, co2) {
      var poststr = "param=" + encodeURI(co) +
                    "&param2=" + encodeURI(co2);
      makePOSTRequest(url, poststr, kam);
   }

   function getvicpar(url, kam, co, co1, co2, co3, co4) {
      var poststr = "param=" + encodeURI(co) +
                    "&param1=" + encodeURI(co1) +
                    "&param2=" + encodeURI(co2) +
                    "&param3=" + encodeURI(co3) +
                    "&param4=" + encodeURI(co4);
      makePOSTRequest(url, poststr, kam);
   }
   function getinzkz(url, kam, co, co1, co2, co3, co4) {
      var poststr = "param=" + encodeURI(co) +
                    "&param1=" + encodeURI(co1) +
                    "&param2=" + encodeURI(co2) +
                    "&param3=" + encodeURI(co3) +
                    "&param4=" + encodeURI( document.getElementById(co4).value);
      makePOSTRequest(url, poststr, kam);
   }