// ----------------------------------------------------------------------------------------------------------------------------------------
// window functions
// ----------------------------------------------------------------------------------------------------------------------------------------

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;
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function getCenterXPos(width) {
	left = (screen.width) ? (screen.width-width)/2 : 0;
	return left;
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function getCenterYPos(height) {
	top = (screen.height) ? (screen.height-height)/2 : 0;
	return top;
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function maximizeWindow() {
	// maximaliseer internet verkenner venster

	top.window.moveTo(0,0);
	if (document.all) { top.window.resizeTo(screen.availWidth,screen.availHeight); }
	else if (document.layers||el) {
		if (top.window.outerHeight<screen.availHeight||top.window.outerWidth<screen.availWidth){
			top.window.outerHeight = screen.availHeight;
			top.window.outerWidth = screen.availWidth;
		}
	}
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function openCenterWindow(url,width,height) {
	// open gecentreerd venster

	left = (screen.width) ? (screen.width-width)/2 : 0;
	top = (screen.height) ? (screen.height-height)/2 : 0;

  	var theWin=
  		window.open(url,'',
	  		"width="+width+","+
	  		"height="+height+","+
	  		"top="+top+","+
	  		"left="+left+","+
			"fullscreen=no,"+
			"menubar=no,"+
			"location=no,"+
			"status=no,"+
			"titlebar=no,"+
			"toolbar=no,"+
			"scrollbars=yes,"+
			"resizable=no,"+
			"directories=no,"+
			"copyhistory=no"
		);
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function refreshParent() {
	window.location.href=window.location.href;
	if (window.progressWindow) { window.progressWindow.close(); }
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function launchWin(inURL,inName,inW,inH) {
	var theW;
	var theH;
	var top=0;
	var left=0;

	if (inW == 0) { theW = screen.availWidth; }
	else {
		theW = inW;
		top = (screen.width-theW)/2;
	}

	if (inH == 0) { theH = screen.availHeight; }
	else {
		theH = inH;
		left = (screen.height-theH)/2;
	}

	var theWin = window.open(inURL,inName,"width=" + theW + ",height=" + theH + ",top=" + top + ",left=" + left + ",resizable=yes,scrollbars=yes");
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function findPosX(obj) {
	var top = 0, left = 0;

	var myTarget=obj;
	while(myTarget!= document.body) {
		top += myTarget.offsetTop;
		left += myTarget.offsetLeft;
		myTarget = myTarget.offsetParent;
	}

	return left;
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function findPosY(obj) {
	var top = 0, left = 0;

	var myTarget=obj;
	while(myTarget!= document.body) {
		top += myTarget.offsetTop;
		left += myTarget.offsetLeft;
		myTarget = myTarget.offsetParent;
	}

	return top;
}

// ----------------------------------------------------------------------------------------------------------------------------------------

function grayOutScreen(vis, options) {
  // Pass true to gray out screen, false to ungray
  // options are optional.  This is a JSON object with the following (optional) properties
  // opacity:0-100         // Lower number = less grayout higher = more of a blackout
  // zindex: #             // HTML elements with a higher zindex appear on top of the gray out
  // bgcolor: (#xxxxxx)    // Standard RGB Hex color code
  // grayOut(true, {'zindex':'50', 'bgcolor':'#0000FF', 'opacity':'70'});
  // Because options is JSON opacity/zindex/bgcolor are all optional and can appear
  // in any order.  Pass only the properties you need to set.
  var options = options || {};
  var zindex = options.zindex || 50;
  var opacity = options.opacity || 70;
  var opaque = (opacity / 100);
  var bgcolor = options.bgcolor || '#000000';
  var dark=document.getElementById('darkenScreenObject');
  if (!dark) {
    // The dark layer doesn't exist, it's never been created.  So we'll
    // create it here and apply some basic styles.
    // If you are getting errors in IE see: http://support.microsoft.com/default.aspx/kb/927917
    var tbody = document.getElementsByTagName("body")[0];
    var tnode = document.createElement('div');           // Create the layer.
        tnode.style.position='absolute';                 // Position absolutely
        tnode.style.top='0px';                           // In the top
        tnode.style.left='0px';                          // Left corner of the page
        tnode.style.overflow='hidden';                   // Try to avoid making scroll bars
        tnode.style.display='none';                      // Start out Hidden
        tnode.id='darkenScreenObject';                   // Name it so we can find it later
    tbody.appendChild(tnode);                            // Add it to the web page
    dark=document.getElementById('darkenScreenObject');  // Get the object.
  }
  if (vis) {
    // Calculate the page width and height
    if( document.body && ( document.body.scrollWidth || document.body.scrollHeight ) ) {
        var pageWidth = document.body.scrollWidth+'px';

        //alert(document.body.scrollHeight+'\n'+document.body.offsetWidth);

        if (document.body.offsetWidth>=1024) {
        	if (document.body.scrollHeight<=1024) var pageHeight = '100%';
        	else var pageHeight = document.body.scrollHeight+"px";
        }
        else var pageHeight = document.body.scrollHeight+'px';
    } else if( document.body.offsetWidth ) {
      var pageWidth = document.body.offsetWidth+'px';
      //var pageHeight = document.body.offsetHeight+'px';
      var pageHeight = '100%';
    } else {
       var pageWidth='100%';
       var pageHeight='100%';
    }

    //set the shader to cover the entire page and make it visible.
    dark.style.opacity=opaque;
    dark.style.MozOpacity=opaque;
    dark.style.filter='alpha(opacity='+opacity+')';
    dark.style.zIndex=zindex;
    dark.style.backgroundColor=bgcolor;
    dark.style.width= pageWidth;
    dark.style.height= pageHeight;
    dark.style.display='block';
  } else {
     dark.style.display='none';
  }
}

// ----------------------------------------------------------------------------------------------------------------------------------------