var http_request = null;
var gOutputType = null;

function makeRequest(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;
  }
  
  http_request.open("POST", url, true);

  //Send the proper header information along with the request
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  
  http_request.onreadystatechange = alertContents;
  http_request.send(parameters);
}

function alertContents() {
  if (http_request.readyState == 4) {
     if (http_request.status == 200) {
        //alert(http_request.responseText);
        result = http_request.responseText;
     } else {
        alert('There was a problem with the request.');
     }
  }
}

function getContent(fobject, fname){
  //layout changes
  if(fobject == "lessenreeksen" && fname == ""){
    document.getElementById("leftcol").style.minHeight = "2796px";
    document.getElementById("rightcol").style.minHeight = "2796px";
    var clmnelem = document.getElementsByClassName("column");          
    for(var e=0; e<clmnelem.length; e++){
      clmnelem[e].style.minHeight = "2796px";
      }
    document.getElementById("box_right").className = "box_rightbig";
    }
  else if(fobject == "inschrijven" || fobject == "fotogalerij"){
    document.getElementById("leftcol").style.minHeight = "1332px";
    document.getElementById("rightcol").style.minHeight = "1332px";
    var clmnelem = document.getElementsByClassName("column");        
    for(var e=0; e<clmnelem.length; e++){
      clmnelem[e].style.minHeight = "1332px";
      }
    document.getElementById("box_right").className = "box_right900";
    }
  else{
    document.getElementById("leftcol").style.minHeight = "1177px";
    document.getElementById("rightcol").style.minHeight = "1177px";
    var clmnelem = document.getElementsByClassName("column");        
    for(var e=0; e<clmnelem.length; e++){
      clmnelem[e].style.minHeight = "1177px";
      }
    document.getElementById("box_right").className = "box_right";
    }
     
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
	 	if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
 	 } else if (window.ActiveXObject){
      	http_request = new ActiveXObject("Microsoft.XMLHTTP");
  	} else {
      return;
  	}
	if (fname) { fname = fname.toLowerCase(); }
    
  var uri="./objects/"+fobject+".php?fname="+fname;

  http_request.onreadystatechange = setContent;
  http_request.open ('GET', uri, true);
  http_request.send (null);
  }

function setContent() {
	if (http_request.readyState == 4){
		var loc = document.getElementById("box_right");
		if (http_request.status == 200){
			var newData = http_request.responseText;
			loc.innerHTML=newData;      
      evalScripts( newData );
     } else {
	 	 		  loc.innerHTML="<h2><span tabindex=\"0\" onfocus=\"this.style.border='1px solid blue';\" onblur=\"this.style.border='none';\" class=\"axs description\">No Content</span></h2>";
	     }
	}
}

/* PICTURES */
function getPictures(theDiv, fname){
	if (window.XMLHttpRequest) {
		http_request = new XMLHttpRequest();
	 	if (http_request.overrideMimeType) {
			http_request.overrideMimeType('text/xml');
		}
 	 } else if (window.ActiveXObject){
      	http_request = new ActiveXObject("Microsoft.XMLHTTP");
  	} else {
      return;
  	}
	if (fname) { fname = fname.toLowerCase(); }
    
  var uri="./objects/getpictures.php?activedir="+fname;

  http_request.onreadystatechange = function() { setContentPictures(theDiv); initScrollLayer(); };
  http_request.open ('GET', uri, true);
  http_request.send (null);
  }

function setContentPictures(theDiv) {
	if (http_request.readyState == 4){
		var loc = document.getElementById(theDiv);    
		if (http_request.status == 200){
      var newData = http_request.responseText;
			loc.innerHTML=newData;      
      evalScripts( newData );
     } else {
	 	 		  loc.innerHTML="<h2><span tabindex=\"0\" onfocus=\"this.style.border='1px solid blue';\" onblur=\"this.style.border='none';\" class=\"axs description\">No Content</span></h2>";
	     }
	}
}

function evalScripts(scripts)
{	try
	{	if(scripts != '')	
		{	var script = "";
			scripts = scripts.replace(/<script[^>]*>([\s\S]*?)<\/script>/gi, function(){
	       	                         if (scripts !== null) script += arguments[1] + '\n';
 	        	                        return '';});
			if(script) (window.execScript) ? window.execScript(script) : window.setTimeout(script, 0);
		}
		return false;
	}
	catch(e)
	{	alert(e)
	}
}

function get(obj) {
  var getstr = "?post=true&";
  
  //for (i=0; i<obj.childNodes.length; i++) {
  for (i=0; i<obj.elements.length; i++) {
      
    if (obj.elements[i].tagName == "INPUT") {     
     
        if (obj.elements[i].type == "text") {
           getstr += encodeURIComponent(obj.elements[i].name) + "=" + encodeURIComponent(obj.elements[i].value) + "&";
        }
        if (obj.elements[i].type == "hidden") {
           getstr += encodeURIComponent(obj.elements[i].name) + "=" + encodeURIComponent(obj.elements[i].value) + "&";
        }
        if (obj.elements[i].type == "checkbox") {
           if (obj.elements[i].checked) {
              getstr += obj.elements[i].name + "=" + encodeURIComponent(obj.elements[i].value) + "&";
              
           } else {
              getstr += obj.elements[i].name + "=&";
           }
        }
        if (obj.elements[i].type == "radio") {
           if (obj.elements[i].checked) {
              getstr += encodeURIComponent(obj.elements[i].name) + "=" + encodeURIComponent(obj.elements[i].value) + "&";
           }
        }
     }   
     if (obj.elements[i].tagName == "SELECT") {
        var sel = obj.elements[i];
        
        getstr += encodeURIComponent(sel.name) + "=" ;
        if(sel.value != "")
          getstr += encodeURIComponent(sel.options[sel.selectedIndex].value);
        getstr += "&";
     }
     if (obj.elements[i].tagName == "TEXTAREA") {
        var sel = obj.elements[i];
        getstr += encodeURIComponent(sel.name) + "=" + encodeURIComponent(sel.value) + "&";
     }
  }
  makeRequestPost('./objects/inschrijven.php', getstr);
}

function makeRequestPost(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;
  }
  
  http_request.open("POST", url, true);

  //Send the proper header information along with the request
  http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  http_request.setRequestHeader("Content-length", parameters.length);
  http_request.setRequestHeader("Connection", "close");
  
  http_request.onreadystatechange = alertContentsPost;
  http_request.send(parameters);
}

function alertContentsPost() {
  if (http_request.readyState == 4) {
     if (http_request.status == 200) {
        //alert(http_request.responseText);
        result = http_request.responseText;
        document.getElementById('box_right').innerHTML = result; 
        evalScripts(result);           
     } else {
        alert('There was a problem with the request.');
     }
  }
}