function JAJAX(changediv,url,parameters){
 this.changediv = changediv;
 this.url = url;
 this.parameters = parameters;
 this.ajaxdone = false;
 
 this.allsystemsgo = function(){
	// alert('ay ay captain - looking for '+this.url);
      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;
      }
      
	  if(this.changediv !== changediv) { changediv = this.changediv; }
	  
      http_request.onreadystatechange = this.alerter;
      http_request.open('POST', this.url, true);
      http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
      http_request.setRequestHeader("Content-length", this.parameters.length);
      http_request.setRequestHeader("Connection", "close");
      http_request.send(this.parameters);
   }
   
 this.alerter = function() {
      if (http_request.readyState == 4) {
         if (http_request.status == 200) {
		result = http_request.responseText;
		document.getElementById(changediv).innerHTML = result;
		this.ajaxdone = true;
         } else {
		document.getElementById(changediv).innerHTML = "<p>request errored!</p>";
         }
      }
   }
}