var detect = navigator.userAgent.toLowerCase();
var OS,browser,version,total,thestring;

/*-----------------------------------------------------------------------------------------------*/

//Browser detect script origionally created by Peter Paul Koch at http://www.quirksmode.org/

function getBrowserInfo() {
	if (checkIt('konqueror')) {
		browser = "Konqueror";
		OS = "Linux";
	}
	else if (checkIt('safari')) browser 	= "Safari"
	else if (checkIt('omniweb')) browser 	= "OmniWeb"
	else if (checkIt('opera')) browser 		= "Opera"
	else if (checkIt('webtv')) browser 		= "WebTV";
	else if (checkIt('icab')) browser 		= "iCab"
	else if (checkIt('msie')) browser 		= "Internet Explorer"
	else if (!checkIt('compatible')) {
		browser = "Netscape Navigator"
		version = detect.charAt(8);
	}
	else browser = "An unknown browser";

	if (!version) version = detect.charAt(place + thestring.length);

	if (!OS) {
		if (checkIt('linux')) OS 		= "Linux";
		else if (checkIt('x11')) OS 	= "Unix";
		else if (checkIt('mac')) OS 	= "Mac"
		else if (checkIt('win')) OS 	= "Windows"
		else OS 								= "an unknown operating system";
	}
}

function checkIt(string) {
	place = detect.indexOf(string) + 1;
	thestring = string;
	return place;
}

/*-----------------------------------------------------------------------------------------------*/

Event.observe(window, 'load', initialize, false);
Event.observe(window, 'load', getBrowserInfo, false);
Event.observe(window, 'unload', Event.unloadCache, false);

var lightbox = Class.create();

lightbox.prototype = {

	yPos : 0,
	xPos : 0,

	initialize: function(ctrl) {
		this.content = ctrl.rel;
		Event.observe(ctrl, 'click', this.activate.bindAsEventListener(this), false);
		ctrl.onclick = function(){return false;};
	},
	
	// Turn everything on - mainly the IE fixes
	activate: function(){
		if (browser == 'Internet Explorer'){
			this.getScroll();
			this.prepareIE('100%', 'hidden');
			this.setScroll(0,0);
			this.hideSelects('hidden');
		}
		this.displayLightbox("block");
	},
	
	// Ie requires height to 100% and overflow hidden or else you can scroll down past the lightbox
	prepareIE: function(height, overflow){
		bod = document.getElementsByTagName('body')[0];
		bod.style.height = height;
		bod.style.overflow = overflow;
  
		htm = document.getElementsByTagName('html')[0];
		htm.style.height = height;
		htm.style.overflow = overflow; 
	},
	
	// In IE, select elements hover on top of the lightbox
	hideSelects: function(visibility){
		selects = document.getElementsByTagName('select');
		for(i = 0; i < selects.length; i++) {
			selects[i].style.visibility = visibility;
		}
	},
	
	// Taken from lightbox implementation found at http://www.huddletogether.com/projects/lightbox/
	getScroll: function(){
		if (self.pageYOffset) {
			this.yPos = self.pageYOffset;
		} else if (document.documentElement && document.documentElement.scrollTop){
			this.yPos = document.documentElement.scrollTop; 
		} else if (document.body) {
			this.yPos = document.body.scrollTop;
		}
	},
	
	setScroll: function(x, y){
		window.scrollTo(x, y); 
	},
	
	displayLightbox: function(display){
		$('overlay').style.display = display;
		$(this.content).style.display = display;
		if(display != 'none') this.actions();		
	},
	
	// Search through new links within the lightbox, and attach click event
	actions: function(){
		lbActions = document.getElementsByClassName('lbAction');
        //alert(lbActions.length);
		for(i = 0; i < lbActions.length; i++) {
			Event.observe(lbActions[i], 'click', this[lbActions[i].rel].bindAsEventListener(this), false);
			lbActions[i].onclick = function(){return false;};
		}
		
		//按样式名，来绑定这个样式要执行些什么函数,你如果要改，这里不用变，改下面绑定的函数的内容就行了
		lbActionPreviouss = document.getElementsByClassName('lbActionPrevious');
        //alert(lbActionPreviouss.length);
		for(i = 0; i < lbActionPreviouss.length; i++) {
			Event.observe(lbActionPreviouss[i], 'click', this[lbActionPreviouss[i].rel].bindAsEventListener(this), false);
			lbActionPreviouss[i].onclick = function(){return false;};
		}
		
		lbActionNexts = document.getElementsByClassName('lbActionNext');
        //alert(lbActionPreviouss.length);
		for(i = 0; i < lbActionNexts.length; i++) {
			Event.observe(lbActionNexts[i], 'click', this[lbActionNexts[i].rel].bindAsEventListener(this), false);
			lbActionNexts[i].onclick = function(){return false;};
		}

	},

	
	// Example of creating your own functionality once lightbox is initiated
	deactivate: function(){
		if (browser == "Internet Explorer"){
			this.setScroll(0,this.yPos);
			this.prepareIE("auto", "auto");
			this.hideSelects("visible");
		}
		
		this.displayLightbox("none");
	},
	
	//绑定的函数名
	deactivateP: function(){
		//这里面的内容，随便改
		//lblPreviouHtmls = document.getElementsByClassName('hidPreviouPic');
		//alert("SLDFK");
		//alert(lblPreviouHtmls.value);
		//window.location.href=lblPreviouHtmls; 
		DivDisplays = document.getElementsByClassName('DivDisplay');
		//alert(DivDisplays.length);
		var flg=true;
		for(i = DivDisplays.length-1; i >0 ; i--) {
			//alert(DivDisplays[i].style.display);
			if(DivDisplays[i].style.display=="inline"){
				flg=false;
				DivDisplays[i].style.display="none";
				i=i-1;
				DivDisplays[i].style.display="inline";
				//alert("SLDFK");
				break;				
			}
		}
		if(flg){
			alert("已达到目录第一页");
		}
	},
	deactivateN: function(){
		//这里面的内容，随便改
		//lblPreviouHtmls = document.getElementsByClassName('lblNextHtml');
		//alert("SLDFK");
		//alert(lblPreviouHtmls.value);
		//window.location.href=lblPreviouHtmls; 
		//这里，是取你定义的display1，这样是可以实现不显示Div1的内容，而显示Div2的内容。
		//但这样有问题，你有多少个呢DIV呢，现在是这么多，到内容页呢？
		//kk=document.getElementById("display1");
		//kk.style.display="none";
		//kk2=document.getElementById("display2");
		//kk2.style.display="";
		//alert(kk);
		DivDisplays = document.getElementsByClassName('DivDisplay');
		//alert(DivDisplays.length);
		var flg=true;
		for(i = 0; i < DivDisplays.length-1; i++) {
			//alert(DivDisplays[i].style.display);
			if(DivDisplays[i].style.display=="inline"){
				flg=false;
				DivDisplays[i].style.display="none";
				i=i+1;
				DivDisplays[i].style.display="inline";
				//alert("SLDFK");
				break;
			}
		}
		if(flg){
			alert("已达到目录最后一页");
		}
	},
	
	//绑定的函数名
	deactivateP2: function(){
		//这里面的内容，随便改
		//lblPreviouHtmls = document.getElementsByClassName('hidPreviouPic');
		//alert("SLDFK");
		//alert(lblPreviouHtmls.value);
		//window.location.href=lblPreviouHtmls; 
		DivDisplays = document.getElementsByClassName('DivDisplay2');
		//alert(DivDisplays.length);
		var flg=true;
		for(i = DivDisplays.length-1; i >0 ; i--) {
			//alert(DivDisplays[i].style.display);
			if(DivDisplays[i].style.display=="inline"){
				flg=false;
				DivDisplays[i].style.display="none";
				i=i-1;
				DivDisplays[i].style.display="inline";
				//alert("SLDFK");
				break;				
			}
		}
		if(flg){
			alert("已达到目录第一页");
		}
	},
	deactivateN2: function(){
		//这里面的内容，随便改
		//lblPreviouHtmls = document.getElementsByClassName('lblNextHtml');
		//alert("SLDFK");
		//alert(lblPreviouHtmls.value);
		//window.location.href=lblPreviouHtmls; 
		//这里，是取你定义的display1，这样是可以实现不显示Div1的内容，而显示Div2的内容。
		//但这样有问题，你有多少个呢DIV呢，现在是这么多，到内容页呢？
		//kk=document.getElementById("display1");
		//kk.style.display="none";
		//kk2=document.getElementById("display2");
		//kk2.style.display="";
		//alert(kk);
		DivDisplays = document.getElementsByClassName('DivDisplay2');
		//alert(DivDisplays.length);
		var flg=true;
		for(i = 0; i < DivDisplays.length-1; i++) {
			//alert(DivDisplays[i].style.display);
			if(DivDisplays[i].style.display=="inline"){
				flg=false;
				DivDisplays[i].style.display="none";
				i=i+1;
				DivDisplays[i].style.display="inline";
				//alert("SLDFK");
				break;
			}
		}
		if(flg){
			alert("已达到目录最后一页");
		}
	}
}

/*-----------------------------------------------------------------------------------------------*/

// Onload, make all links that need to trigger a lightbox active
function initialize(){
	addLightboxMarkup();
	lbox = document.getElementsByClassName('lbOn');
	for(i = 0; i < lbox.length; i++) {
		valid = new lightbox(lbox[i]);
	}
}

// Add in markup necessary to make this work. Basically two divs:
// Overlay holds the shadow
// Lightbox is the centered square that the content is put into.
function addLightboxMarkup() {

	bod 				= document.getElementsByTagName('body')[0];

	overlay 			= document.createElement('div');
	overlay.id			= 'overlay';

	bod.appendChild(overlay);
}