function ajaxGet(div,action,functionExecute,loadingMessage,doTransparancy,cache,removeCache) {
	
	if(loadingMessage) {
		loading(loadingMessage);
	} else {
		loading("aan het laden..");	
	}
	
    //show cached page
    //var newPage = getPage(action);
    //if(cache&&newPage&&!removeCache) {
    //    makeContent(div,newPage,functionExecute,doTransparancy,true);
    //    setLatestKey(action);        

    //} else {
	  $.ajax({
		  type: "GET",
		  url: "servlet.php",
		  scriptCharset: "UTF-8",
		  data: action+'&ajax=true&unique='+Math.random(),
		  error: function(XMLHttpRequest, textStatus, errorThrown) {
			//alert(textStatus);  
			if(textStatus=="timeout") {
				loading("de verbinding is verbroken, probeer opnieuw..");
			}
		  },
		  success: function(content){
			  //if(cache) {
			  //  savePage(action,content);
			  //}
			  unsetLoading();
			  makeContent(div,content,functionExecute,doTransparancy);
			 
		  }
	  });
    //}
}

function ajaxPost(div,form,functionExecute,loadingMessage,doTransparancy) {
	if(loadingMessage) {
		loading(loadingMessage);
	} else {
		loading("aan het laden..");	
	}	
	var formHash = $('#'+form).attr("hash");
	
	if(validateForm(form)) {
	
		if(!formHash) {
			var method = $('#'+form).attr("method");
			var query = $('#'+form).serialize()+"&formName="+form;
			
			if(method&&method=="get") {	
				var hash = $('#'+form).attr("hash");
				location = "#"+hash+"&"+query;
				
			} else {		
				$.post("servlet.php", query+"&ajax=true",function(content) {
					unsetLoading();
					makeContent(div,content,functionExecute,doTransparancy);
				});
			}
		} else {
			location = '#'+formHash+'/'+$('#'+form).serialize();
		}
	}
}

function validateForm(form) {
	
	$('#'+form+' input').each(function(index) {
		if($(this).attr("validate")) {
			if(!validator($(this).attr("validate"),$(this).val())) {
				return false
			}
		}
	});
	
	return true;
}


var message = null;

function loading(text) {
		
	if(message) {
		message.text = text;
		message.identifier = message.identifier+1;
	} else {
		message = [{}];
		message.text = text;
		message.identifier = 1;
	}
	
	$('#loading').html(text	);
	
	$('#loadingHolder').css("visibility","visible");
	checkLoadingActive(1,message.identifier);
}

function unsetLoading() {
	if(message) {
		delete message;	

		$('#loadingHolder').css("visibility","hidden");
		$('#loading').html("");	
		inProgresEvent = '';
	}
}

function checkLoadingActive(attempt,identifier) {
	if(identifier==message.identifier) {		
		if(message&&attempt==2) {
			$('#loading').html("nog steeds bezig..");
		} else if(message&&attempt==4) {
			$('#loading').html("er is een fout opgetreden, probeer de pagina te vernieuwen");
		}
		
		attempt++;
		
		setTimeout("checkLoadingActive('"+attempt+"','"+identifier+"');",(3000*attempt));		
	}
}

function makeContent(div,content,functionExecute,doTransparancy,fromCache) {
    if(div) {
        if(doTransparancy) {
            $(div).fadeTo(300,0.0,function() {
                $(div).html(content);
				checkLinks(div);
				
                if(functionExecute) {
                    $(div).fadeTo(100,1.0,function() {		
                        functionExecute(content);
                    });
                } else {
                    $(div).fadeTo(100,1,0);
                }
            });
			
        } else {
            $(div).html(content);
			checkLinks(div);
            if(functionExecute) {
                functionExecute(content);
			}
		}
		
    } else if(functionExecute) {
        functionExecute(content);
    }
}

function makePopup(content,newTitle,newWidth,beforeFunction,afterFunction,closeFunction) {
	if(beforeFunction)
		beforeFunction();
	
	if(popupBuffer.length==0) {
		$("body").prepend('<div id="darkLayer"></div>');
		
		$('#darkLayer').bind("click",function() {
			$('#popup').dialog('close');
		}).css("height",$(document).height());	
		
		loading("Bezig met openen..");
		
		$('#darkLayer').fadeTo(300,0.7,createPopup(content,newTitle,newWidth,beforeFunction,afterFunction,closeFunction));
	} else {
		createPopup(content,newTitle,newWidth,beforeFunction,afterFunction,closeFunction)	
	}		
}

var popupBuffer = new Array();
function createPopup(content,newTitle,newWidth,beforeFunction,afterFunction,closeFunction) {

	var popup = '#popup';
	if($('#popup').dialog("isOpen")) {
		popup = 'popup'+Math.ceil(100*Math.random());
		$('body').append('<div id="'+popup+'"></div>');
		popup = '#'+popup;
	}

	$(popup).html(content).dialog({
	  show: "blind",
	  title: newTitle,
	  minHeight: 140,
	  minWidth: 300,
	  width: newWidth,
	  resizable: false,
	  open: function() {
		  inProgresEvent = '';
		  unsetLoading();	
		  popupBuffer.push(popup);
		  
		   $('#darkLayer').bind("click",function() {
		  		closePopup();
		   })
		  
		  
		  if(afterFunction)
			  afterFunction(content);			
	  },
	  close: function() {
		  if(closeFunction) {
			  closeFunction();	
		  }
		  
		  for(var i = 0;i<popupBuffer.length;i++) {
		     if(popupBuffer[i]==popup) {
				popupBuffer.splice(i, 1);
			 }
		  }
		  		  
		  $(popup).dialog('destroy');
		  if(popupBuffer.length==0) {
			  $("#darkLayer").fadeTo(300,0.0,function() {
				 $("#darkLayer").remove();									  
			  });
		  }
	  }
  });
	  
  checkLinks();	
}

function closePopup() {
	 $("#darkLayer").fadeTo(300,0.0,function() {
	   $("#darkLayer").remove();									  
	});
	for(var i = 0;i<popupBuffer.length;i++) {			 
		$(popupBuffer[i]).dialog('close');
	}	
}

//hashMap
HashMap = function(){
    this.dict = {};
}
HashMap.prototype._shared = {
    id: 1
};
HashMap.prototype.put = function put(key, value){
    if(typeof key == "object"){
        if(!key.hasOwnProperty._id){
            key.hasOwnProperty = function(key){
                return Object.prototype.hasOwnProperty.call(this, key);
            }
            key.hasOwnProperty._id = this._shared.id++;
        }
        this.dict[key.hasOwnProperty._id] = value;
    }else{
        this.dict[key] = value;
    }
    return this; // for chaining
}
HashMap.prototype.get = function get(key){
    if(typeof key == "object"){
        if(this.dict) {
            return this.dict[key.hasOwnProperty._id];
        } else {
            return null;
        }
    }
    return this.dict[key];
}
HashMap.prototype.update = function update(key,value) {
    if(this.dict[key]) {
        this.dict[key] = value;
    } return this.dict[key];
}
HashMap.prototype.remove = function remove(key) {
    if(this.dict[key]) {
        this.dict[key] = null;
    }
}


//cacheSystem
var pageCache = new HashMap();
var key = null;
var div = "content";
function savePage(action,content) {
    if(pageCache.get(action) == null) {
        pageCache.put(action,content);
        setLatestKey(action);
    }
}

function getPage(action) {
    return pageCache.get(action);
}

function updatePage(action,content) {
    if(!content) {
        content = $('#'+getDiv()).html();
    }
    var cache = pageCache.get(action);
    if(cache) {
        pageCache.update(action,content);
    }
}

function removePage(action) {
    pageCache.remove(action);
}

function getLatestKey() {
    return key;
}

function setLatestKey(newKey) {
    key = newKey;
}

function getDiv() {
    return div;
}