/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/
 *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 *
 * Gets the full width/height because it's different for most browsers.
 */
function getViewportHeight() {
	if (window.innerHeight!=window.undefined) return window.innerHeight;
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
	if (document.body) return document.body.clientHeight; 
	return window.undefined; 
}
function getViewportWidth() {
	if (window.innerWidth!=window.undefined) return window.innerWidth; 
	if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
	if (document.body) return document.body.clientWidth; 
	return window.undefined; 
}

/**
 * POPUP WINDOW CODE
 * Used for displaying DHTML only popups instead of using buggy modal windows.
 *
 * By Seth Banks (webmaster at subimage dot com)
 * http://www.subimage.com/
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/subModal
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;

var gHideSelects = false;


var gTabIndexes = new Array();
// Pre-defined list of tags we want to disable/enable tabbing into
var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME");	

// If using Mozilla or Firefox, use Tab-key trap.
if (!document.all) {
	document.onkeypress = keyDownHandler;
}

/**
 * Initializes popup code on load.	
 */
function initPopUp() {
	gPopupMask = document.getElementById("popupMask");
	gPopupContainer = document.getElementById("popupContainer");
	gPopFrame = document.getElementById("popupFrame");
	// check to see if this is IE version 6 or lower. hide select boxes if so
	// maybe they'll fix this in version 7?
	var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
	if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {
		gHideSelects = true;
	}
}
addEvent(window, "load", initPopUp);

 /**
	* @argument width - int in pixels
	* @argument height - int in pixels
	* @argument url - url to display
	* @argument returnFunc - function to call when returning true from the window.
	*/

var lastPopupUrl = '';
var lastPopupWidth = 0;
var lastPopupHeight = 0;
var lastPopupReturnFunc;
var lastAlwaysCallReturn;
function showPopWin( url, width, height, returnFunc, alwaysCallReturn ) {
	try {
		lastPopupUrl = url;
		lastPopupWidth = width;
		lastPopupHeight = height;
		lastPopupReturnFunc = returnFunc;
		lastAlwaysCallReturn = alwaysCallReturn;
		
		gPopupIsShown = true;
		gPopupMask.style.display = "block";
		gPopupContainer.style.display = "block";
		// calculate where to place the window on screen
		centerPopWin(width, height);
		
		var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
		
		gPopupContainer.style.width = width + "px";
		gPopupContainer.style.height = (height+titleBarHeight) + "px";
		// need to set the width of the iframe to the title bar width because of the dropshadow
		// some oddness was occuring and causing the frame to poke outside the border in IE6
		gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
		gPopFrame.style.height = (height) + "px";
		
		// set the url
		gPopFrame.src = url;

		gReturnFunc = returnFunc;
	    if ( alwaysCallReturn ) {
		    popupAlwaysCallReturnFunction();
	    }
    	// for IE
    	if (gHideSelects == true) {
    		hideSelectBoxes();
    	}
		
		setPopTitleWithTitle( "" );
		
	    document.getElementById( 'modalMiniMaxiButton' ).href = "javascript:maximizePopWin();";
	    document.getElementById( 'modalMiniMaxiImage' ).alt = "Maximaliseren";
	    document.getElementById( 'modalMiniMaxiImage' ).src = "/images/maximize.gif";
    } catch ( error ) { 
        // er is iets fout gegaan
        // dan proberen we het over 0,1 seconde gewoon nog een keer
        setTimeout( "showPopWinAgain();", 100 );
    }
}
function showPopWinAgain() {
    if ( lastPopupUrl != '' ) {
        showPopWin( lastPopupUrl, lastPopupWidth, lastPopupHeight, lastPopupReturnFunc, lastAlwaysCallReturn );
    }
}

function printPopupWin() {
    if ( browserIsInternetExplorer() ) {
        document.popupFrame.focus();
        document.popupFrame.print();
    } else {
        window.frames['popupFrame'].focus();
        window.frames['popupFrame'].print(); 
    }
}

// wanneer er ook bij het kruisje de return functie gebruikt moet worden
function popupAlwaysCallReturnFunction() {
    document.getElementById( 'modalCloseButton' ).href = "javascript:hidePopWin(true);";
}

//
/*function centerPopWin(width, height) {
	if (gPopupIsShown == true) {
		if (width == null || isNaN(width)) {
			width = gPopupContainer.offsetWidth;
		}
		if (height == null) {
			height = gPopupContainer.offsetHeight;
		}
		
		var fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();
		gPopupMask.style.height = fullHeight + "px";
		gPopupMask.style.width = fullWidth + "px";
		var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
		
		gPopupContainer.style.top = ((fullHeight - (height+titleBarHeight)) / 2) + "px";
		gPopupContainer.style.left =  ((fullWidth - width) / 2) + "px";
		//alert(fullWidth + " " + width + " " + gPopupContainer.style.left);
	}
}*/
var gi = 0;
function centerPopWin(width, height) {
	if (gPopupIsShown == true) {
		if (width == null || isNaN(width)) {
			width = gPopupContainer.offsetWidth;
		}
		if (height == null) {
			height = gPopupContainer.offsetHeight;
		}
		
		var fullHeight = getViewportHeight();
		var fullWidth = getViewportWidth();
		
		var theBody = document.documentElement;
		
		var scTop = parseInt(theBody.scrollTop,10);
		var scLeft = parseInt(theBody.scrollLeft,10);
		
		gPopupMask.style.height = fullHeight + "px";
		gPopupMask.style.width = fullWidth + "px";
		gPopupMask.style.top = scTop + "px";
		gPopupMask.style.left = scLeft + "px";
		
		//window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;
		
		var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
		
		gPopupContainer.style.top = (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + "px";
		gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
		//alert(fullWidth + " " + width + " " + gPopupContainer.style.left);
	}
}
addEvent(window, "resize", centerPopWin);
//addEvent(window, "scroll", centerPopWin);
window.onscroll = centerPopWin;

/**
 * @argument callReturnFunc - bool - determines if we call the return function specified
 * @argument returnVal - anything - return value 
 */
function hidePopWin(callReturnFunc) {
	gPopupIsShown = false;
	if (gPopupMask == null) {
		return;
	}
	gPopupMask.style.display = "none";
	gPopupContainer.style.display = "none";
	if (callReturnFunc == true && gReturnFunc != null) {
		gReturnFunc(window.frames["popupFrame"].returnVal);
	}
	if (gHideSelects == true) {
		displaySelectBoxes();
	}
	// WH: nix loading scherm
	//gPopFrame.src = 'loading.html';
	gPopFrame.src = '';
}

function maximizePopWin() {
	var viewportHeight = getViewportHeight();
	var maxHeight = viewportHeight - ( viewportHeight * 0.08 );

	var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
	
	gPopupContainer.style.top = 0;
	
	gPopupContainer.style.height = (maxHeight-titleBarHeight) + "px";
	gPopFrame.style.height = (maxHeight) + "px";
	
	centerPopWin( lastPopupWidth, maxHeight );
	
    document.getElementById( 'modalMiniMaxiButton' ).href = "javascript:restorePopWin();";
    document.getElementById( 'modalMiniMaxiImage' ).alt = "Vorig formaat";
    document.getElementById( 'modalMiniMaxiImage' ).src = "/images/minimize.gif";
}

function restorePopWin() {
	var maxHeight = lastPopupHeight;

	var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
	
	gPopupContainer.style.top = 0;
	
	gPopupContainer.style.height = (maxHeight-titleBarHeight) + "px";
	gPopFrame.style.height = (maxHeight) + "px";
	
	centerPopWin( lastPopupWidth, lastPopupHeight );
	
    document.getElementById( 'modalMiniMaxiButton' ).href = "javascript:maximizePopWin();";
    document.getElementById( 'modalMiniMaxiImage' ).alt = "Maximaliseren";
    document.getElementById( 'modalMiniMaxiImage' ).src = "/images/maximize.gif";
}

/**
 * Sets the popup title based on the title of the html document it contains.
 * Uses a timeout to keep checking until the title is valid.
 */
function setPopTitle() {
	/*if (window.frames["popupFrame"].document.title == null) {
		window.setTimeout("setPopTitle();", 10);
	} else {
		document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;
	}*/
}
function setPopTitleWithTitle( atitle ) {
	document.getElementById("popupTitle").innerHTML = atitle;
}

// Tab key trap. iff popup is shown and key was [TAB], suppress it.
// @argument e - event - keyboard event that caused this function to be called.
function keyDownHandler(e) {
    if (gPopupIsShown && e.keyCode == 9)  return false;
}

// For IE.  Go through predefined tags and disable tabbing into them.
function disableTabIndexes() {
	if (document.all) {
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) {
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) {
				gTabIndexes[i] = tagElements[k].tabIndex;
				tagElements[k].tabIndex="-1";
				i++;
			}
		}
	}
}

// For IE. Restore tab-indexes.
function restoreTabIndexes() {
	if (document.all) {
		var i = 0;
		for (var j = 0; j < gTabbableTags.length; j++) {
			var tagElements = document.getElementsByTagName(gTabbableTags[j]);
			for (var k = 0 ; k < tagElements.length; k++) {
				tagElements[k].tabIndex = gTabIndexes[i];
				tagElements[k].tabEnabled = true;
				i++;
			}
		}
	}
}


/**
* Hides all drop down form select boxes on the screen so they do not appear above the mask layer.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
*
* Thanks for the code Scott!
*/
function hideSelectBoxes() {
	for(var i = 0; i < document.forms.length; i++) {
		for(var e = 0; e < document.forms[i].length; e++){
			if(document.forms[i].elements[e].tagName == "SELECT") {
				document.forms[i].elements[e].style.visibility="hidden";
			}
		}
	}
}

/**
* Makes all drop down form select boxes on the screen visible so they do not reappear after the dialog is closed.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
*/
function displaySelectBoxes() {
	for(var i = 0; i < document.forms.length; i++) {
		for(var e = 0; e < document.forms[i].length; e++){
			if(document.forms[i].elements[e].tagName == "SELECT") {
			document.forms[i].elements[e].style.visibility="visible";
			}
		}
	}
}