var http_request = false;
   function makePOSTRequest(url, parameters) {
      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;
      }
      
	  //alert(alertid);
	  
      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() {
	  
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
            //alert(http_request.responseText);
            result = http_request.responseText;
            document.getElementById('myspan').innerHTML = result; 
			
         } else {
            alert('There was a problem with the request. ' + http_request.status);
         }
      }
   }
   
   function get(obj) {
      //om vi har flera formelement med samma namn måste vi göra på det här sättet för att rätt element skall uppdateras
	  //obj är här formulärets id
	  //alert(obj.name);
					
		var poststr = "c=" + encodeURI(document.getElementById("c").value) +
                    "&pid=" + encodeURI(document.getElementById("pid").value) +
					"&aid=" + encodeURI(document.getElementById("aid").value) +
					"&kat=" + encodeURI(document.getElementById("kat").value) +
					"&m=" + encodeURI(document.getElementById("m").value) +
					"&p=" + encodeURI(document.getElementById("prot").value) +
					"&n=" + encodeURI(document.getElementById("n").value) +
					"&t=" + encodeURI(document.getElementById("t").value);
					
      makePOSTRequest('/ajax/addcomment.asp', poststr);
   }