function getPageSize(){
	
	var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = document.body.scrollWidth;
		yScroll = window.innerHeight + window.scrollMaxY;
	} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

function getBodyScrollTop()
{
	return self.pageYOffset || (document.documentElement && document.documentElement.scrollTop) || (document.body && document.body.scrollTop);
}

function getBodyScrollLeft()
{
	return self.pageXOffset || (document.documentElement && document.documentElement.scrollLeft) || (document.body && document.body.scrollLeft);
}

function getClientWidth()
{
  return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientWidth:document.body.clientWidth;
}

function getClientHeight()
{
  return document.compatMode=='CSS1Compat' && !window.opera?document.documentElement.clientHeight:document.body.clientHeight;
}

function getClientCenterX()
{
		var arrayPageSize = getPageSize();
		var hei=arrayPageSize[1];
		var wid=document.body.scrollWidth;

	return parseInt(wid/2);
}

function getClientCenterY()
{
		var arrayPageSize = getPageSize();
		var hei=arrayPageSize[1];
		var wid=document.body.scrollWidth;

	return parseInt(hei/2)+getBodyScrollTop();
}

function hideSelects()
{
	var node_list = document.getElementsByTagName('select');
	for (var i = 0; i < node_list.length; i++) {
		var node = node_list[i];
		node.style.display = 'none';
	}
}

function displaySelects()
{
	var node_list = document.getElementsByTagName('select');
	for (var i = 0; i < node_list.length; i++) {
		var node = node_list[i];
		node.style.display = 'inline';
	}
}

	function openPopup()
		{
		document.getElementById("popup-content").innerHTML='<object type="application/x-shockwave-flash" data="H2ION_contol_v9_music.swf" width="630" height="630"><param name="movie" value="H2ION_contol_v9_music.swf" /><param name="wmode" value="opaque"></object>';

		hideSelects();

		var width=630;
		var height=630;

		var arrayPageSize = getPageSize();
		var hei=arrayPageSize[1]-4;
		var wid=document.body.scrollWidth;

		var half_width=width/2;
		var half_height=height/2;

		document.getElementById('shaded').style.height=hei+"px";
		document.getElementById('shaded').style.width=wid+"px";

		var tp=100;

		document.getElementById('infoiframe_div').style.top=tp+"px";
		document.getElementById('infoiframe_div').style.left=(getClientCenterX()-half_width)+"px";

		document.getElementById('infoiframe_div').style.width=width+"px";
		document.getElementById('infoiframe_div').style.height=height+"px";

		document.getElementById('shaded').className="shaded_vis";
		document.getElementById('infoiframe_div').className="infoiframe_visible";
		}

	function closepopup()
		{
			document.getElementById("popup-content").innerHTML='';
			displaySelects();
			document.getElementById('shaded').className="shaded_hid";
			document.getElementById('shaded').className="shaded_hid";
			document.getElementById('infoiframe_div').className="infoiframe_hidden";

		}