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 closeinfo()
		{
			document.getElementById('popup-content').innerHTML="";
			document.getElementById('shaded').className="shaded_hid";
			document.getElementById('infoiframe_div').className="infoiframe_hidden";
		}




	function openPopup()
		{
		var width=640;
		var height=340;
		var arrayPageSize = getPageSize();
		var hei=arrayPageSize[1];
		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";



		if((getClientCenterY()-half_height)>0) var tp=getClientCenterY()-half_height; else var tp=10;



//		tp=220;


		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";

		}