function update() {
  if (request.readyState == 4) {
    if (request.status == 200) {
      /* Get the response from the server */
      var response = request.responseText;
      var array = response.split("|");
      var alertNumber = array[0];
      var course_id = array[1];
      var text1 = array[2];
      if (alertNumber == "1") {
         document.getElementById("searchbox").style.display="none";
         document.getElementById("fragment-2").style.display="block";
         document.getElementById("fragment-2").innerHTML = text1;
      } else {
         alert(text1);
      }
     } else {
      alert("Error! Request status is " + request.status);
    }
  }
}

function getcourseinfo(course_id) {
   var previous_course = document.getElementById("previous_course").value;
   var array = previous_course.split("|");
     if (array[0] == "") {
     } else {
     document.getElementById("course"+array[0]).className = array[1];
     }
   var this_class = document.getElementById("course"+course_id).className;
   document.getElementById("course"+course_id).className = "course_clicked";
   document.getElementById("previous_course").value = course_id+"|"+this_class;
   var url = "portfolio_getcourseinfo.php";
   request.open("POST", url, true);
   request.onreadystatechange = update;
   request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
   request.send("course_id=" + escape(course_id));                       
}                       

function removecourseinfo(course_id) {
   document.getElementById("course"+course_id+"a").className = "course_box_inactive";
         document.getElementById("course"+course_id+"b").className = "course_box_inactive";
         document.getElementById("course"+course_id+"b").innerHTML = "";

}

function updatesearch() {
  if (request.readyState == 4) {
    if (request.status == 200) {
      /* Get the response from the server */
      var response = request.responseText;
      var array = response.split("|");
      var alertNumber = array[0];
      var text1 = array[1];
      if (alertNumber == "1") {
         document.getElementById("fragment-2").style.display="none";
         document.getElementById("searchbox").style.display="block";
         document.getElementById("searchbox_countries").innerHTML = text1;
      } else {
         alert(text1);
      }
     } else {
      alert("Error! Request status is " + request.status);
    }
  }
}

function getsearchboxes() {
   var previous_course = document.getElementById("previous_course").value;
   var array = previous_course.split("|");
     if (array[0] == "") {
     } else {
     document.getElementById("course"+array[0]).className = array[1];
     }
   var url = "portfolio_getsearchboxes.php";
   request.open("POST", url, true);
   request.onreadystatechange = updatesearch;
   request.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
   request.send("previous_course=" + escape(previous_course));                       
}