document.write('<script type="text/javascript" src="' + (isBackend?'../':'') + 'lib/js/item/item.js"></script>');

function showItemsList()
{
	var arrayPageSize = getPageSize();
	$('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px', visibility: 'visible' });
    new Effect.Appear('overlay', { duration: 0.5, from: 0.0, to: 0.5 });
    var offset = document.viewport.getScrollOffsets();
    var left = (document.viewport.getWidth() + offset['left'] - 980)/2; if (left < 0) left = 0;
    var top = (document.viewport.getHeight() + offset['top'] - $('items-list').getHeight()) / 2; if (top < 0) top = 0; 
    $('items-list').setStyle({display: 'block', left: left + 'px', top: top + 'px'});    
}

function hideItemsList()
{
    $('overlay').setStyle({ width: 0 + 'px', height: 0 + 'px', visibility: 'hidden', opacity: 0.0 });
    $('items-list').setStyle({display: 'none'});    
}

//
//  getPageSize()
//
var pageWidth,pageHeight;
var windowWidth, windowHeight;
function getPageSize() {
        
    var xScroll, yScroll;
	
	if (window.innerHeight && window.scrollMaxY) {	
		xScroll = window.innerWidth + window.scrollMaxX;
		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;
	}
	
	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			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 = xScroll;		
	} else {
		pageWidth = windowWidth;
	}

	return [pageWidth,pageHeight];
}