// <![CDATA[
  // JavaScript Document
	
	var _currentOpen = "#howto_desc_1";
	$(document).ready(function(){
			var arrPageSizes = ___getPageSize();			
			
     $("#howto_graphic").click(function () {
			if ( $("!#overlay") ) {
				$("body").append("<div id=\"overlay\"></div>");
				$("#overlay,#howto_close").click(function () { 
					$("#overlay").remove();	$("#lightbox").hide();
					return false;
				});
				__setTop();
			}
			$("#overlay").css({
					width:		arrPageSizes[0],
					height:		arrPageSizes[1],
					opacity: 0.5
				});
			$("#lightbox").css({
					display: "block"
				});
			
			return false;
     });
		 
		 $("#howto_btn_1").click(function () {      
      ___showSlides("#howto_desc_1");
			return false;
     });
		 
		 $("#howto_btn_2").click(function () {
			___showSlides("#howto_desc_2");
			return false;
     });
		 
		 $("#howto_btn_3").click(function () {      
      ___showSlides("#howto_desc_3");
			return false;
     });
		 
		 $("#howto_btn_4").click(function () {      
      ___showSlides("#howto_desc_4");
			return false;
     });
		 
		 $("#howto_btn_5").click(function () {      
      ___showSlides("#howto_desc_5");
			return false;
     });
		 
		 $(window).resize(function() {
				// Get page sizes
				var arrPageSizes = ___getPageSize();
				// Style overlay and show it
				$('#overlay').css({
					width:		arrPageSizes[0],
					height:		arrPageSizes[1]
				});
				// Get page scroll
				__setTop();
			});
			
   });
	
	function __setTop(){
			
			var arrPageScroll = ___getPageScroll();
			// Calculate top and left offset for the jquery-lightbox div object and show it
			$('#lightbox').css({
				top:	arrPageScroll[1]+40,
				left:	"50%"				
			}).show();
			// Assigning click events in elements to close overlay
			/*$('#overlay,#lightbox').click(function() {
				_finish();									
			});*/
			$('#lightbox').hide();
	}
	
	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;
			}
			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;
			}
			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);
			return arrayPageSize;
		};
		
		function ___getPageScroll() {
			var xScroll, yScroll;
			if (self.pageYOffset) {
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} else if (document.body) {// all other Explorers
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;	
			}
			arrayPageScroll = new Array(xScroll,yScroll);
			return arrayPageScroll;
		};
		
		function ___showSlides(currentObj){
			if( _currentOpen ) $(_currentOpen).hide();
			_currentOpen	= currentObj;
			$(_currentOpen).show("normal");
		};

  // ]]>