/*
	Lightbox JS
*/

function LightboxShow()
{	
	var objOverlay = document.getElementById('lightbox_overlay');
	var objLightbox = document.getElementById('lightbox_container');
	var objContent = document.getElementById('lightbox_content');
	var objExit = document.getElementById('lightbox_exit');
	var objLoader = document.getElementById('lightbox_loader');
	
	var arrayPageSize = getPageSize();
	var arrayPageScroll = getPageScroll();	
	
	// Overlay div
	
	objOverlay.style.height = (arrayPageSize[1] + 'px');
	new Effect.Appear(objOverlay,{duration:1.2,from:0,to:0.7});
	
	// Content container div
	
	var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - parseInt(objLightbox.style.height) + 6) / 2);
	var lightboxLeft = ((arrayPageSize[0] - parseInt(objLightbox.style.width) + 6) / 2);
	
	objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
	objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
	
	new Effect.Appear(objLightbox,{duration:.5});
	new Effect.Appear(objExit,{duration:.5});
	
	// Content loader div
	
	new Effect.Appear(objLoader,{duration:.5});
	
	// Content div
	
	objContent.style.display = 'none';
}

function LightboxHide()
{
	var objLoader = document.getElementById('lightbox_loader');
	
	objLoader.style.display = 'none';
	
	new Effect.Fade(document.getElementById('lightbox_content'),{duration:.5});
	new Effect.Fade(document.getElementById('lightbox_container'),{duration:.5});
	new Effect.Fade(document.getElementById('lightbox_overlay'),{duration:1.2});
}

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

//
// 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;
}

function insertBR(id)
{
	var text = document.getElementById(id).value;
	var pattern = new RegExp('\n', 'g');
	document.getElementById(id).value = text.replace(pattern, '<br />');
}