// µ¯´°½Å±¾
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;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);
	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;
	}
//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)
	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = xScroll;		
	} else {
		pageWidth = windowWidth;
	}
//	console.log("pageWidth " + pageWidth)
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}
var pageS=new Array();
pageS=getPageSize();
var contBox=document.getElementById("contBox");
var cover=document.getElementById("cover");
var tmpAlpha=0.0;
var tmpAlphaN=0.5;
function show(cover,id){
	var objCover=document.getElementById(cover);
	var objId=document.getElementById(id);
	var scrollW = pageS[2]; 
	var scrollH = pageS[3];   
	var T=(scrollH-objId.offsetHeight)/2+document.body.scrollTop||document.documentElement.scrollTop;
	var L=(scrollW-objId.offsetWidth)/2+document.body.scrollLeft||document.documentElement.scrollLeft;
	objCover.style.width = scrollW+"px";
	objCover.style.height= scrollH+"px";
	objCover.style.visibility="visible";
	objId.style.visibility="visible";
	objId.style.top=T+"px";
	objId.style.left=L+"px";
	AddOpacity();
}
function hide(cover,id){
	var objCover=document.getElementById(cover);
	var objId=document.getElementById(id);
	objCover.style.visibility="hidden";
	objId.style.visibility="hidden";
}
function AddOpacity(){
contBox.style.opacity=tmpAlpha;
contBox.style.filter="alpha(opacity="+tmpAlpha*100+")";
cover.style.opacity=tmpAlpha;
cover.style.filter="alpha(opacity="+tmpAlpha*80+")";
	tmpAlpha+=0.1;
	if(tmpAlpha>=0.5){
		cover.style.opacity = 0.5;		
		}
	if(tmpAlpha>=1){
		contBox.style.opacity = 1;
		return;}else{
	setTimeout("AddOpacity()",20);}
}
function DecOpacity(){
contBox.style.opacity=tmpAlphaN;
contBox.style.filter="alpha(opacity="+tmpAlphaN*100+")";
cover.style.opacity=tmpAlphaN;
cover.style.filter="alpha(opacity="+tmpAlphaN*60+")";
	tmpAlphaN-=0.05;
	if(tmpAlphaN<=0){
	contBox.style.opacity = 0;
	contBox.style.visibility="hidden";
	cover.style.visibility="hidden";
	tmpAlpha=0.0;
	tmpAlphaN=0.5;
		//clearTimeout()
		return;}else{
	setTimeout("DecOpacity()",20);}
}