var	cancel_function	= null;
var	ok_function		= null;
var	popup_remember	= null;

var popup_alert;
var popup_background;
var popup_cancel;
var popup_favicon;
var popup_iframe;
var popup_menubar;
var popup_ok;
var popup_text;
var popup_title;
var popup_alert;
var popup_window;

function popup_click_cancel() {	
	// hide popup. Must go before cancel_function because that might show another popup.
	popup_hide();

	// run cancel function
	if (cancel_function!=null) {
		cancel_function(popup_remember);
		popup_reset();
	}
}
function popup_click_close() {
	popup_hide_window();
}
function popup_click_ok() {
	// hide popup. Must go before ok_function because that might show another popup.
	popup_hide();
	
	// run ok function
	if (ok_function!=null) {
		ok_function(popup_remember);
		popup_reset();
	}
}
function popup_hide() {
	// hide alert
	popup_alert.className		= "hidden";
	
	// hide background, unless window is still visible (for file manager, etc).
	if (popup_window.className.indexOf("hidden")!=-1) {
		popup_background.className	= "hidden";
	}
}
function popup_hide_window() {
	// hide alert
	popup_window.className		= "hidden";
	
	// hide background, unless alert is still visible (unlikely).
	if (popup_alert.className.indexOf("hidden")!=-1) {
		popup_background.className	= "hidden";
	}	
}
function popup_reset() {
	ok_function		= null;
	cancel_function	= null;
	popup_remember	= null;
}
/**
* from model_[...]
*/
function popup_init() {
	//alert("popup_init");
	popup_alert			= document.getElementById("popup_alert");
	popup_background	= document.getElementById("popup_background");
	popup_cancel		= document.getElementById("popup_cancel");
	popup_favicon		= document.getElementById("popup_favicon");
	popup_iframe		= document.getElementById("popup_iframe");
	popup_menubar		= document.getElementById("popup_menubar");
	popup_ok			= document.getElementById("popup_ok");	
	popup_text			= document.getElementById("popup_text");
	popup_title			= document.getElementById("popup_title");
	popup_window		= document.getElementById("popup_window");
}
function popup_show_url(_url, _title) {
	// test init
	if (typeof(popup_background)=='undefined') {alert("popup_background is undefined. Use popup_init()");}
	
	// show background
	popup_background.className = "";

	// clear iframe, in case we've opened another page before.
	//popup_iframe.src = "about:blank"; // didn't work...
	
	// go iframe
	popup_iframe.src = _url;
	
	// set title
	popup_title.innerHTML = (typeof(_title)=="undefined") ? _url : _title;

	// show iframe + menubar. hide text, ok, cancel. See popup.css
	popup_window.className	= "";
}
function popup_show_text_only(_text) {
	//alert("popup_show_text_only "+_text)
	
	// test init
	if (typeof(popup_background)=='undefined') {alert("popup_background is undefined. Use popup_init()");}
	
	// show background
	popup_background.className = "";

	// set text
	popup_text.innerHTML	= _text;

	// show only text
	popup_alert.className	= "text_only";	
}
function popup_show_ok(_text, _style, _ok_function, _ok_remember) {
	// test init
	if (typeof(popup_background)=='undefined') {alert("popup_background is undefined. Use popup_init()");}
	// test vars
	else if (typeof(_text)!="string") {alert("popup_show_ok requires text. _text="+_text);}
	else if (typeof(_style)!="string") {alert("popup_show_ok requires _style. _style="+_style);}
	else {
		// show background
		popup_background.className = "";
	
		// set text
		popup_text.innerHTML	= _text;
	
		// set style (and hide iframe + menubar) See popup.css: welcome /error /delete /question
		popup_alert.className	= "ok "+_style;
	
		// remember stuff
		ok_function		= (typeof(_ok_function)=='undefined') ? null : _ok_function;
		popup_remember	= (typeof(_remember)=='undefined') ? null : _remember;
	}
}
function popup_show_ok_cancel(_text, _style, _ok_function, _cancel_function, _remember) {
	// test init
	if (typeof(popup_background)=='undefined') {alert("popup_backgound is undefined. Use popup_init()");}
	// test vars
	else if (typeof(_text)!="string") {alert("popup_show_ok_cancel requires text. _text="+_text);}
	else if (typeof(_style)!="string") {alert("popup_show_ok_cancel requires _style. _style="+_style);}
	else if (typeof(_ok_function)!="function") {alert("popup_show_ok_cancel requires _ok_function. _ok_function="+_ok_function);}
	else if (typeof(_cancel_function)!="function") {alert("popup_show_ok_cancel requires _cancel_function. _cancel_function="+_cancel_function);}
	else {
		// show background
		popup_background.className = "";
		
		// set text
		popup_text.innerHTML	= _text;
		
		// set style (and hide iframe + menubar) See popup.css: welcome /error /delete /question
		popup_alert.className	= "ok_cancel "+_style;
		
		// remember stuff
		ok_function		= (typeof(_ok_function)=='undefined') ? null : _ok_function;
		cancel_function	= (typeof(_cancel_function)=='undefined') ? null : _cancel_function;
		popup_remember	= (typeof(_remember)=='undefined') ? null : _remember;
	}
}

function popup_text_tips() {
	var style = "style='padding:5px;border-bottom-color:#999999;border-bottom-style:solid;border-bottom-width:1px;'"
	var s = "De tekstweergave kunt u aanpassen met de volgende codes:<br/><br/>";
	s += "<table style='border:1px solid #999999;margin:0px;padding:0px'>";
	s += "<tr><td "+style+">**dik gedrukt**</td><td "+style+"><b>dik gedrukt</b></td></tr>";
	s += "<tr><td "+style+">//schuin gedrukt//</td><td "+style+"><i>schuin gedrukt</i></td></tr>";
	s += "<tr><td "+style+">Link naar http://www.digidicht.nl</td><td "+style+">Link naar <a href='http://www.digidicht.nl' target='_blank'>www.digidicht.nl</a></td></tr>";
	s += "<tr><td "+style+">Link naar [http://google.com een site].</td><td "+style+">Link naar <a href='http://google.com'>een site</a>.</td></tr>";
	s += "<tr><td "+style+">Link naar [mailto:info@example.com een email adres].</td><td "+style+">Link naar <a href=\"mailto:info@example.com\">een email adres</a>.</td></tr>";
	s += "</table>";
	popup_show_ok(s, "");
}