var indicator_img_path = "images/indicator.gif";
var indicator_img_html = "<img name=\"http://www.taeryong.net/images/ibox_indicator\" src=\""+indicator_img_path+"\" alt=\"Loading...\" style=\"width:128px;height:128px;\"/>";

function init_ibox() {
var elem_wrapper = "ibox";

createIbox(document.getElementsByTagName("body")[0]);

var docRoot = document.getElementsByTagName("a");
var ibAttr = "rel";

var e;
for (var i = 0; i < docRoot.length - 1; i++) {
e = docRoot[i];
if(e.getAttribute(ibAttr)) {
var t = e.getAttribute(ibAttr);
if ((t.indexOf("ibox") != -1)  ||  t.toLowerCase() == "ibox") {
e.onclick = function() {
var t = this.getAttribute(ibAttr);
var params = parseQuery(t.substr(5,999));
var url = this.href;
if(this.target != "") {url = this.target} 
var title = this.title;
showBG();
showIbox(url,title,params);	// show ibox
window.onscroll = maintPos;
window.onresize = maintPos;
return false;
}; 
}}}}

showBG = function() {
var box_w = getElem('ibox_w');

var opacity_level = 4;
box_w.style.opacity = 0;
box_w.style.filter = 'alpha(opacity=0)';

setBGOpacity = setOpacity;
for (var i=0;i<=opacity_level;i++) {setTimeout("setIboxOpacity('ibox_w',"+i+")",70*i);} // from quirksmode.org

box_w.style.display = "";
var pagesize = new getPageSize();
var scrollPos = new getScrollPos();
var ua = navigator.userAgent;
if(ua.indexOf("MSIE ") != -1) {box_w.style.width = pagesize.width+'px';} 
else {box_w.style.width = pagesize.width-20+'px';}
box_w.style.height = pagesize.height+scrollPos.scrollY+'px';
selectVisibility("hidden");
}

selectVisibility = function(v) {
var selectElems = document.getElementsByTagName('select');	
for(var i = 0; i < selectElems.length; ++i) {
selectElems[i].style.visibility = v;
}}

hideBG = function() {
var box_w = getElem('ibox_w');
box_w.style.display = "none";
selectVisibility("visible");
}

var loadCancelled = false;
showIndicator = function() {
var ibox_p = getElem('ibox_progress');
ibox_p.style.display = "";
posToCenter(ibox_p);
ibox_p.onclick = function() {hideIbox();hideIndicator();loadCancelled = true;}
}

hideIndicator = function() {
var ibox_p = getElem('ibox_progress');
ibox_p.style.display = "none";
ibox_p.onclick = null;
}

createIbox = function(elem) {

var strHTML = "<div id=\"ibox_w\" style=\"display:none;\"></div>";
strHTML +=	"<div id=\"ibox_progress\" style=\"display:none;\">";
strHTML +=  indicator_img_html;
strHTML +=  "</div>";
strHTML +=	"<div id=\"ibox_wrapper\" style=\"display:none\">";

strHTML +=	"<table align=\"center\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\">";
strHTML +=	"<tr>";
strHTML +=	"<td style=\"padding-bottom:2px;\"><img src=\"http://www.taeryong.net/images/student-login.gif\" width=\"111\" height=\"20\" border=0 alt=\"Student Login\"></td>";
strHTML +=	"</tr>";
strHTML +=	"</table>";

strHTML +=	"<div id=\"ibox_content\"></div>";

strHTML +=	"<div id=\"ibox_footer_wrapper\">";
strHTML +=	"<div id=\"ibox_close\" style=\"float:right;\">";
strHTML +=	"<table cellspacing=\"0\" cellpadding=\"0\" border=\"0\">";
strHTML +=	"<tr>";
strHTML +=	"<td width=\"13\" style=\"padding-top:4px;\"><img src=\"http://www.taeryong.net/images/xsm-delete.gif\" width=\"10\" height=\"10\" border=0 alt=\"Close Logn Window\"></td>";
strHTML +=	"<td style=\"padding-top:2px;padding-right:2px;\"><a class=\"linkxsm\" style=\"color: #000000;\" id=\"ibox_close_a\" href=\"javascript:void(null);\">Close Login Window</a></td>";
strHTML +=	"</tr>";
strHTML +=	"</table>";
strHTML +=	"</div>";
strHTML +=  "<div id=\"ibox_footer\">&nbsp;</div>";
strHTML +=  "</div>";

strHTML +=  "</div>";
strHTML +=  "</div>";

var docBody = document.getElementsByTagName("body")[0];
var ibox = document.createElement("div");
ibox.setAttribute("id","ibox");
ibox.style.display = '';
ibox.innerHTML = strHTML;
elem.appendChild(ibox);
}

var ibox_w_height = 0;
showIbox = function(url,title,params) {
var ibox = getElem('ibox_wrapper');
var ibox_type = 0;
					
var ibox_footer = getElem('ibox_footer');
if(title != "") {ibox_footer.innerHTML = title;} else {ibox_footer.innerHTML = "<img src=\"http://www.taeryong.net/images/taeryong-logo-xsm.gif\" width=\"87\" height=\"20\" border=0>";}

url = url.toLowerCase();

var urlString = /\.jpg|\.jpeg|\.png|\.gif|\.html|\.htm|\.php|\.cfm|\.asp|\.aspx|\.jsp|\.jst|\.rb|\.txt/g;
var urlType = url.match(urlString);

if(urlType == '.jpg' || urlType == '.jpeg' || urlType == '.png' || urlType == '.gif'){
ibox_type = 0;

showIndicator();

var imgPreloader = new Image();

imgPreloader.onload = function(){

imgPreloader = resizeImageToScreen(imgPreloader);
hideIndicator();

getElem('ibox_content').style.overflow = "hidden";

var strHTML = "<a href=\"javascript:void(null);\"><img name=\"ibox_img\" src=\""+url+"\" style=\"width:"+imgPreloader.width+"px;height:"+imgPreloader.height+"px;border:0;\"/></a>";

if(loadCancelled == false) {
// set width and height
ibox.style.height = imgPreloader.height+'px';
ibox.style.width = imgPreloader.width+'px';
ibox.style.display = "";
ibox.style.visibility = "hidden";
posToCenter(ibox); 	
ibox.style.visibility = "visible";
setIBoxContent(strHTML);
}
}

loadCancelled = false;
imgPreloader.src = url;

} else if(url.indexOf("#") > 0) {
var strHTML = "";
ibox_type = 1;

if(params['height']) {ibox.style.height = params['height']+'px';} 
else {ibox.style.height = '200px';}

if(params['width']) {ibox.style.width = params['width']+'px';} 
else {ibox.style.width = '300px';}

ibox.style.display = "";
ibox.style.visibility = "hidden";
posToCenter(ibox); 	
ibox.style.visibility = "visible";

var elemSrcId = url.substr(url.indexOf("#") + 1,1000);
var elemSrc = getElem(elemSrcId);

if(elemSrc) {
strHTML = elemSrc.innerHTML;
}

setIBoxContent(strHTML);

}else if(urlType=='.htm'||urlType=='.html'||urlType=='.php'||
urlType=='.asp'||urlType=='.aspx'||urlType=='.jsp'||
urlType=='.jst'||urlType=='.rb'||urlType=='.txt'||
urlType=='.cfm') {

ibox_type = 2;

showIndicator();
http.open('get',url,true);

http.onreadystatechange = function() {
if(http.readyState == 4){
hideIndicator();

if(params['height']) {ibox.style.height = params['height']+'px';} 
else {ibox.style.height = '200px';}

if(params['width']) {ibox.style.width = params['width']+'px';} 
else {ibox.style.width = '300px';}

ibox.style.display = "";
ibox.style.visibility = "hidden";
posToCenter(ibox); 	
ibox.style.visibility = "visible";

var response = http.responseText;
setIBoxContent(response);
}}

http.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
http.send(null);
} 

ibox.style.opacity = 0;
ibox.style.filter = 'alpha(opacity=0)';	
var ibox_op_level = 10;

setIboxOpacity = setOpacity;
for (var i=0;i<=ibox_op_level;i++) {setTimeout("setIboxOpacity('ibox_wrapper',"+i+")",30*i);}

if(ibox_type == 1 || ibox_type == 2) {
ibox.onclick = null;getElem("ibox_close_a").onclick = function() {hideIbox();}
} else {
ibox.onclick = hideIbox;getElem("ibox_close_a").onclick = null;
}}

setOpacity = function (elemid,value)	{
var e = getElem(elemid);
e.style.opacity = value/10;
e.style.filter = 'alpha(opacity=' + value*10 + ')';
}

resizeImageToScreen = function(objImg) {

var pagesize = new getPageSize();
var x = pagesize.width - 100;
var y = pagesize.height - 100;

if(objImg.width > x) { 
objImg.height = objImg.height * (x/objImg.width); 
objImg.width = x; 
if(objImg.height > y) { 
objImg.width = objImg.width * (y/objImg.height); 
objImg.height = y; 
}
} 

else if(objImg.height > y) { 
objImg.width = objImg.width * (y/objImg.height); 
objImg.height = y; 
if(objImg.width > x) { 
objImg.height = objImg.height * (x/objImg.width); 
objImg.width = x;
}
}

return objImg;
}

maintPos = function() {
var ibox = getElem('ibox_wrapper');
var box_w = getElem('ibox_w');
var pagesize = new getPageSize();
var ua = navigator.userAgent;

if(ua.indexOf("MSIE ") != -1) {box_w.style.width = pagesize.width+'px';} 
else {box_w.style.width = pagesize.width-20+'px';}

if(ua.indexOf("Opera/9") != -1) {box_w.style.height = document.body.scrollHeight+'px';}
else {box_w.style.height = document.body.scrollHeight+50+'px';}
posToCenter(ibox);
}

hideIbox = function() {
hideBG();
var ibox = getElem('ibox_wrapper');
ibox.style.display = "none";

clearIboxContent();
window.onscroll = null;
}

posToCenter = function(elem) {
var scrollPos = new getScrollPos();
var pageSize = new getPageSize();
var emSize = new getElementSize(elem);
var x = Math.round(pageSize.width/2) - (emSize.width /2) + scrollPos.scrollX;
var y = Math.round(pageSize.height/2) - (emSize.height /2) + scrollPos.scrollY-40;	
elem.style.left = x+'px';
elem.style.top = y+'px';	
}

getScrollPos = function() {
var docElem = document.documentElement;
this.scrollX = self.pageXOffset || (docElem&&docElem.scrollLeft) || document.body.scrollLeft;
this.scrollY = self.pageYOffset || (docElem&&docElem.scrollTop) || document.body.scrollTop;
}

getPageSize = function() {
var docElem = document.documentElement
this.width = self.innerWidth || (docElem&&docElem.clientWidth) || document.body.clientWidth;
this.height = self.innerHeight || (docElem&&docElem.clientHeight) || document.body.clientHeight;
}

getElementSize = function(elem) {
this.width = elem.offsetWidth ||  elem.style.pixelWidth;
this.height = elem.offsetHeight || elem.style.pixelHeight;
}

setIBoxContent = function(str) {
clearIboxContent();
var e = getElem('ibox_content');
e.innerHTML = str;
e.style.overflow = "auto";
}
clearIboxContent = function() {
var e = getElem('ibox_content');
e.innerHTML = "";
e.style.overflow = "hidden";
}

getElem = function(elemId) {
return document.getElementById(elemId);	
}

parseQuery = function(query) {
var Params = new Object ();
if (!query) return Params; 
var Pairs = query.split(/[;&]/);
for ( var i = 0; i < Pairs.length; i++ ) {
var KeyVal = Pairs[i].split('=');
if ( ! KeyVal || KeyVal.length != 2 ) continue;
var key = unescape( KeyVal[0] );
var val = unescape( KeyVal[1] );
val = val.replace(/\+/g, ' ');
Params[key] = val;
}

return Params;
}

/********************************************************
Make this IE7 Compatible ;)
*********************************************************/
createRequestObject = function() {
var xmlhttp;
/*@cc_on
@if (@_jscript_version>= 5)
try {xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");}
catch (E) {xmlhttp = false;}
}
@else
xmlhttp = false;
@end @*/
if (!xmlhttp && typeof XMLHttpRequest != "undefined") {
try {xmlhttp = new XMLHttpRequest();} catch (e) {xmlhttp = false;}
}
return xmlhttp;
}

var http = createRequestObject();

function addEvent(obj, evType, fn){ 
if (obj.addEventListener){ 
obj.addEventListener(evType, fn, false); 
return true; 
} else if (obj.attachEvent){ 
var r = obj.attachEvent("on"+evType, fn); 
return r; 
} else { 
return false; 
} 
}
addEvent(window, 'load', init_ibox);