function getPageSizeWithScroll() {
	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;
	}
	
	var windowWidth, windowHeight;
	
	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 pageHeight;
}

function getPopUpTop() {

	var pageY;
	var scrollY;

	if (window.innerHeight) {	
		pageY = window.innerHeight;
	} else { // IE
		pageY = document.documentElement.clientHeight;
	}
	
	if(window.pageYOffset) {
		scrollY = window.pageYOffset;
	} else if(document.body.scrollTop) {
		scrollY = document.body.scrollTop;
	} else {
		scrollY = document.documentElement.scrollTop;
	}
	
	return scrollY + pageY/2 - document.getElementById("popUp").offsetHeight/2;
}

function openProductPopup(he1, he2, img) {
	
	document.getElementById("popUpHeader1").innerHTML = he1;
	document.getElementById("popUpHeader2").innerHTML = he2;
	
	document.getElementById("popUpImg").src = img;
	
	document.getElementById("popUpBg").style.height = getPageSizeWithScroll() + "px";
	
	document.getElementById("popUpBg").style.display = "block";
	document.getElementById("popUp").style.display = "block";
	
	document.getElementById("popUp").style.top = getPopUpTop() + "px";
	document.getElementById("popUp").style.width = (document.getElementById("popUpImg").offsetWidth + 20)  + "px";
	document.getElementById("popUp").style.margin = "0px -" + document.getElementById("popUp").offsetWidth/2 + "px";
}

function closeProductPopup() {
	document.getElementById("popUpBg").style.display = "none";
	document.getElementById("popUp").style.display = "none";
	document.getElementById("popUp").style.top = "-9999px";
}