/* Get a parameter from the documents URL (location) */
function getParam(paramName) {
  var pname = paramName+"=";
  var plen = pname.length;
  var retVal = "";
  var loc,pos;
  loc = document.location.toString();
  pos = loc.indexOf(pname);
  if (pos != -1 ) {
    retVal = loc.substr(pos+plen,loc.length);
    if (retVal.indexOf("&") != -1) {
      retVal = retVal.substr(0,retVal.indexOf("&"));
    }
  }
  return retVal;
}

/* Get course initialization params */
function getInitParams() {
  var updurl=getParam("updurl");
  var sessionId=getParam("sessionId");
  return "updurl="+updurl+"&sessionId="+sessionId;
}