window.onload = function() {
	external_links();
	popup_init();
	ie_hover();
}

/** 
 * external links, v.1.0
 * ustawienie \target="_blank"\ dla wszystkich linkow zawierajacych \rel="external"\
*/
function external_links() {
	if (!document.getElementsByTagName) {return false;}
	var anchors = document.getElementsByTagName("a");
	for (var i=0; i<anchors.length; i++)
		if (anchors[i].getAttribute("href") && anchors[i].getAttribute("rel") == "external")
			anchors[i].target = "_blank";
}

/** 
 * popup, v.1.0
 * dla linków z klasą "pupup" otwiera zdjęcie lub stronę w nowym oknie, ustala jego wielkość z tagu "rel"
*/
function popup_init()
{
	if (!document.getElementsByTagName) {return false;}
	var anchors = document.getElementsByTagName('a');
	for(i=0; i<anchors.length; i++)
		if (anchors[i].className == 'popup')
			anchors[i].onclick = popup;
	return true;
}
function popup()
{
	var size = this.getAttribute('rel');
	var url = this.getAttribute('href');
	if (/png|gif|jpg|jpe|jpeg/.exec(this.href)) 
		var img = true;

	/* computes dimensions passed from "rel" tag; format: <width>x<height>, output: width=<width>,height=<height> */
	if (size) {
		size = size.split('x');
		popup_size = 'width='+size[0]+',height='+size[1];
	}
	else {
		var popup_size = 'width=640,height=480';
	}

	/* window options */
	var win_options = 'dependent=1,resizable=1,scrollbars=0,location=0,menubar=0,statusbar=0,'+popup_size;

	/* creates new window */
  if (win = window.open(this.href,'_blank',win_options)) {
		if (img) {
			var imgs = this.getElementsByTagName('img');
			if (imgs[0]) {
				var title = imgs[0].getAttribute('title');
				var alt = imgs[0].getAttribute('alt');
			}
			else {
				var title = this.getAttribute('title');
				var alt = title;
			}
			win.document.open();
			win.document.write('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">');
			win.document.write('<html xmlns="http://www.w3.org/1999/xhtml">');
			win.document.write('<head><title>'+title+'</title>');
			win.document.write('<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />');
			win.document.write('<style type="text/css">body {margin:0; padding:0; background:#fff;}</style>');
			win.document.write('</head><body>');
			win.document.write('<img src="'+this.href+'" alt="'+alt+'" title="'+title+'" onclick="window.close()" />');
			win.document.write('</body></html>');
			win.document.close();
		}
		return false;
  }
	
  /* follows link on failure */
	return true; 
}

/* 
 obsluga LI po nadaniu klasy 'iehover' dla UL
*/
function ie_hover() {
	if (!document.all || !document.getElementsByTagName) {return false;}
	
	var tags = document.getElementsByTagName("ul");
	for (var i=0; i<tags.length; i++) {
		if (tags[i].className == 'iehover') {
			for (j=0; j<tags[i].childNodes.length; j++) {
				var node = tags[i].childNodes[j];
				if (node.nodeName=="LI") {
					node.onmouseover=function() {	this.className+=" hover"; }
					node.onmouseout=function() { this.className=this.className.replace(" hover", ""); }
				}
			}
		}
	}
}