function sack(file) {
	this.xmlhttp = null;

	this.resetData = function() {
		this.method = "POST";
  		this.queryStringSeparator = "?";
		this.argumentSeparator = "&";
		this.URLString = "";
		this.encodeURIString = true;
  		this.execute = false;
  		this.element = null;
		this.elementObj = null;
		this.requestFile = file;
		this.vars = new Object();
		this.responseStatus = new Array(2);
  	};

	this.resetFunctions = function() {
  		this.onLoading = function() { };
  		this.onLoaded = function() { };
  		this.onInteractive = function() { };
  		this.onCompletion = function() { };
  		this.onError = function() { };
		this.onFail = function() { };
	};

	this.reset = function() {
		this.resetFunctions();
		this.resetData();
	};

	this.createAJAX = function() {
		try {
			this.xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (e1) {
			try {
				this.xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (e2) {
				this.xmlhttp = null;
			}
		}

		if (! this.xmlhttp) {
			if (typeof XMLHttpRequest != "undefined") {
				this.xmlhttp = new XMLHttpRequest();
			} else {
				this.failed = true;
			}
		}
	};

	this.setVar = function(name, value){
		this.vars[name] = Array(value, false);
	};

	this.encVar = function(name, value, returnvars) {
		if (true == returnvars) {
			return Array(encodeURIComponent(name), encodeURIComponent(value));
		} else {
			this.vars[encodeURIComponent(name)] = Array(encodeURIComponent(value), true);
		}
	}

	this.processURLString = function(string, encode) {
		encoded = encodeURIComponent(this.argumentSeparator);
		regexp = new RegExp(this.argumentSeparator + "|" + encoded);
		varArray = string.split(regexp);
		for (i = 0; i < varArray.length; i++){
			urlVars = varArray[i].split("=");
			if (true == encode){
				this.encVar(urlVars[0], urlVars[1]);
			} else {
				this.setVar(urlVars[0], urlVars[1]);
			}
		}
	}

	this.createURLString = function(urlstring) {
		if (this.encodeURIString && this.URLString.length) {
			this.processURLString(this.URLString, true);
		}

		if (urlstring) {
			if (this.URLString.length) {
				this.URLString += this.argumentSeparator + urlstring;
			} else {
				this.URLString = urlstring;
			}
		}

		// prevents caching of URLString
		this.setVar("rndval", new Date().getTime());

		urlstringtemp = new Array();
		for (key in this.vars) {
			if (false == this.vars[key][1] && true == this.encodeURIString) {
				encoded = this.encVar(key, this.vars[key][0], true);
				delete this.vars[key];
				this.vars[encoded[0]] = Array(encoded[1], true);
				key = encoded[0];
			}

			urlstringtemp[urlstringtemp.length] = key + "=" + this.vars[key][0];
		}
		if (urlstring){
			this.URLString += this.argumentSeparator + urlstringtemp.join(this.argumentSeparator);
		} else {
			this.URLString += urlstringtemp.join(this.argumentSeparator);
		}
	}

	this.runResponse = function() {
		eval(this.response);
	}

	this.runAJAX = function(urlstring) {
		if (this.failed) {
			this.onFail();
		} else {
			this.createURLString(urlstring);
			if (this.element) {
				this.elementObj = document.getElementById(this.element);
			}
			if (this.xmlhttp) {
				var self = this;
				if (this.method == "GET") {
					totalurlstring = this.requestFile + this.queryStringSeparator + this.URLString;
					this.xmlhttp.open(this.method, totalurlstring, true);
				} else {
					this.xmlhttp.open(this.method, this.requestFile, true);
					try {
						this.xmlhttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded")
					} catch (e) { }
				}

				this.xmlhttp.onreadystatechange = function() {
					switch (self.xmlhttp.readyState) {
						case 1:
							self.onLoading();
							break;
						case 2:
							self.onLoaded();
							break;
						case 3:
							self.onInteractive();
							break;
						case 4:
							self.response = self.xmlhttp.responseText;
							self.responseXML = self.xmlhttp.responseXML;
							self.responseStatus[0] = self.xmlhttp.status;
							self.responseStatus[1] = self.xmlhttp.statusText;

							if (self.execute) {
								self.runResponse();
							}

							if (self.elementObj) {
								elemNodeName = self.elementObj.nodeName;
								elemNodeName.toLowerCase();
								if (elemNodeName == "input"
								|| elemNodeName == "select"
								|| elemNodeName == "option"
								|| elemNodeName == "textarea") {
									self.elementObj.value = self.response;
								} else {
									self.elementObj.innerHTML = self.response;
								}
							}
							if (self.responseStatus[0] == "200") {
								self.onCompletion();
							} else {
								self.onError();
							}

							self.URLString = "";
							break;
					}
				};

				this.xmlhttp.send(this.URLString);
			}
		}
	};

	this.reset();
	this.createAJAX();
}

// AJAX CREATE NEW //
/////////////////////
var ajax = new sack();
/////////////////////
/////////////////////

function ajaxFail()
{
	var title='Failure';
	var output='Ajax failure';
	AjaxMessage(title,output);
}

function ajaxError()
{
	var title='Error';
	var output='Ajax error';
	AjaxMessage(title,output);
}



function controlForm (action,form_id)
{
    var form               = $(form_id); 
    var data               = 'ajax.php?action='+action;	

	for (i = 0; i < form.elements.length; i++)
    {
        e = form.elements[i];
        if (e.id.substring(0,6) == 'piece_')
        {

            if ((e.type == 'text' || e.type == 'textarea' || e.type == 'password' || e.type == 'file' || e.type == 'hidden') || (e.type == 'radio' && e.checked == true))
            {
   				
			data += '&' + e.name + '=' + encodeURIComponent (e.value);
				
            }
			else if(e.type == 'submit' || e.type == 'button')
			{
				data += '&' + e.name + '=true';
			}
            else if (e.type == 'select-one')
            {
                data += '&' + e.name + '=' + e.options[e.selectedIndex].value;
            }
            else if (e.type == 'checkbox')
            {
                data += '&' + e.name + '=' + (e.checked == true ? 1 : 0);
            }
        }
    }
	

	
	ajax.requestFile = data;// Specifying which file to get
	ajax.onCompletion= messageForm;	// Specify function that will be executed after file has been found
	ajax.onLoading = loadingAjax;
	ajax.onLoaded= loadedAjax;	
	ajax.onError = ajaxError;
	ajax.onFail = ajaxFail;
	ajax.runAJAX();	
	

}	

function loadingAjax(){
	Processing=1;
	displayLoadingMessage('<table border="0" style="height:100%; width:100%;" cellpadding="0" cellspacing="0"><tr><td align="center" valign="middle"><center><img align="absmiddle" src="tm_images/ajax-loader-5.gif"><br>Loading please wait</center></td></tr></table>','loading');	
	
}
	
function loadedAjax(){
	Processing=0;
	messageLoading.close(); 
}
	
function messageForm(){
			
	eval(ajax.response);
					
	if(error==1){
					
		AjaxMessage(title,output,0,0);
					
	}else{
					
	
		location.reload();

	}
	
	
}
			
function AjaxMessage(title,output,redirect,redirection){
	
	if(redirect==1){
	displayStaticMessage('<center><div align=\'left\'><h3>'+title+'</h3>'+output+'</div><input type="button" class="button" value="Close" style="margin-top:10px;" onclick=" messageObj.close(); location.reload();" /></center>',false);	
	}else{
	displayStaticMessage('<center><div align=\'left\'><h3>'+title+'</h3>'+output+'</div><input type="button" class="button" value="Close" style="margin-top:10px;" onclick="messageObj.close();" /></center>',false);	
	}
}

	
	
function validForm ()
{
	return $('form_result').value == 'true';
						
						
									

}

// processing more Ajax reuests
this.Processing=0;
this.AjaxProcesses=new Array();
this.AjaxTotalProcesses=0;

function ajaxProcess()
{
	
	if(AjaxTotalProcesses>0 && Processing==0){
		updating=AjaxProcesses[AjaxTotalProcesses-1];
		update=updating.split("^"); 
		getContent(update[0],update[1],update[2]);	
		AjaxTotalProcesses--;
	}
	
}

function getContent(div,fileName,time)
{
	this.GC_div=div;
	this.GC_timerTime=time;
	this.GC_fileName=fileName;
	
	
	// is er een proces aan de gang?
	if(Processing==0){
		
		this.GC_t_div=GC_div;
		this.GC_t_timerTime=GC_timerTime;
		this.GC_t_fileName=GC_fileName;
		
		ajax.requestFile = GC_t_fileName;
		ajax.onCompletion = showContent;
		ajax.onLoading = loadingAjax;
		ajax.onLoaded= loadedAjax;
		ajax.runAJAX();
	
	// ja er is een proces aan de gang
	}else{

		AjaxProcesses[AjaxTotalProcesses]=GC_div+"^"+GC_fileName+"^"+GC_timerTime;	
		AjaxTotalProcesses++;
		
	}
				
	
} 

function showContent()	// Displaying content in the content <div>
{

	
	$(GC_t_div).innerHTML = ajax.response;	// ajax.response is a variable that contains the content of the external file	
	
	//TIMER
	if(GC_t_timerTime!=0 && GC_t_timerTime.length!=0){
		
		AjaxProcesses[AjaxTotalProcesses]=GC_t_div+"^"+GC_t_fileName+"^"+GC_t_timerTime;	
		AjaxTotalProcesses++;
	
		setTimeout('ajaxProcess()',GC_t_timerTime);
		
	}
	
}

function showLoadingAjax()
{
	$(GC_t_div).innerHTML = '<img src=\'tm_images/ajax-loader-5.gif\'>';
	Processing=1;	
}

function showLoadedAjax()
{
	Processing=0;	
}





messageObj = new DHTML_modalMessage();	// We only create one object of this class
	messageObj.setShadowOffset(5);	// Large shadow
	
	function displayStaticMessage(messageContent,cssClass)
	{
		messageObj.setHtmlContent(messageContent);
		messageObj.setSize(400,200);
		messageObj.setCssClassMessageBox(cssClass);
		messageObj.setSource(false);	// no html source since we want to use a static message here.
		messageObj.setShadowDivVisible(true);	// Disable shadow for these boxes	
		messageObj.display();
		
		
	}
	
	function closeMessage()
	{
		messageObj.close();	
	}



messageLoading = new DHTML_modalMessage();	// We only create one object of this class
	messageLoading.setShadowOffset(5);	// Large shadow
	
	function displayLoadingMessage(messageContent,cssClass)
	{
		messageLoading.setHtmlContent(messageContent);
		messageLoading.setSize(120,60);
		messageLoading.setCssClassMessageBox(cssClass);
		messageLoading.setSource(false);	// no html source since we want to use a static message here.
		messageLoading.setShadowDivVisible(false);	// Disable shadow for these boxes	
		messageLoading.display();
		
		
	}
	
	function closeMessage()
	{
		messageLoading.close();	
	}