//Add a setheight method to element object
Object.extend(Element, {
	setHeight: function(element,h) {
   		element = $(element);
    	element.style.height = h +"px";
	},
	setTop: function(element,t) {
	   	element = $(element);
    	element.style.top = t +"px";
	}
});

function getWindowHeight() {
if (navigator.userAgent.indexOf("MSIE") > 0) {
var sSize = (document.body.clientHeight);
return sSize;
} else {                                                
var sSize = (window.outerHeight);
return sSize;
}
return;      
}
// -----------------------------------------------------------------------------------

//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
	}

	arrayPageScroll = new Array('',yScroll) 
	return arrayPageScroll;
}

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

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
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;
}

var ImageZoomer = function() {
	
	var zoomClass = "ebiz";
	var closeId = "zoomClose";
	var zoomContainerId = "zoomViewer";
	var zoomContainerEl;
	var imgPath = "/img/ebusiness/"; // needs trailing slash.
	
	function cursorPointer() {
		this.style.cursor = "pointer";
	}
	function cursorDefault() {
		this.style.cursor = "default";
	}
	
	function show(e,obj) {
		zoomContainerEl = document.getElementById(zoomContainerId);
		var smallImgUrl = this.src.split("/");
		var newUrl = smallImgUrl[smallImgUrl.length-1].split(".");
		// added 7/21/09
		if (newUrl[0].indexOf("-thmb") >= 0) {
		  newUrl[0] = newUrl[0].substr(0,newUrl[0].indexOf("-thmb")); 
		}
		// END
		var largeImgUrl = newUrl[0] + ".jpg";
		var fullPath = "";
		for(i=0; i<smallImgUrl.length-1; i++){
			fullPath = fullPath + smallImgUrl[i] + "/";
		}
		document.getElementById("bigImg").src = fullPath + largeImgUrl;
	
		//align the window
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var videoTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);
		
		Element.setTop(zoomContainerEl, videoTop+100);			

		zoomContainerEl.style.display = "block";

	}
	
	function attachShow() {
		var imgs = document.getElementsByClassName(zoomClass);
		Event.addEvent(imgs,"click", show);
		Event.addEvent(imgs,"mouseover",cursorPointer);
		Event.addEvent(imgs,"mouseoout",cursorDefault);
	}
	
	function hide(e,obj) {
		zoomContainerEl.style.display = "none";
		Event.stopEvent(e);
	}
	function attachHide() {
		Event.addEvent(closeId,"click", hide);
		Event.addEvent(closeId,"mouseover",cursorPointer);
		Event.addEvent(closeId,"mouseoout",cursorDefault);
	}
	
	return {
		init: function() {
			attachShow();
			attachHide();
		}
	};
	
}();

Event.addEvent(window,"load",ImageZoomer.init);