function email(obj) {
        filter=/^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9])+$/;
        if(!obj.match(filter)){
                return false;
        }
        return true;
}

function obj(id) {
	return document.getElementById(id);
}

function select_li(sender) {
	var li = sender.parentNode;
	var ul = li.parentNode;
	var lis = ul.getElementsByTagName('li');
	for(i=0,im=lis.length;i<im;i++) {
		if (lis[i].parentNode.className != 'items') {
			lis[i].className = '';

			if (lis[i].getElementsByTagName('ul')[0]) lis[i].getElementsByTagName('ul')[0].style.display = 'none';
		}
	}// for

	li.className = 'selected';
	if (li.getElementsByTagName('ul')[0])
		li.getElementsByTagName('ul')[0].style.display = 'block';

	return true;
}
function show_hide_ul(obj) {
	obj2 = obj;
	do {
		obj2 = obj2.parentNode;
	} while (!obj2.getElementsByTagName('ul')[0]);
	obj2 = obj2.getElementsByTagName('ul')[0];
	obj2.style.display = ( obj2.style.display == 'block' ? 'none' : 'block' );
}

function pop_gallery(url, title, sizex, sizey) {
 if (!sizex) sizex = 515;
 if (!sizey) sizey = 620;

 if (sizex > screen.width - 150) sizex = screen.width - 120;
if (sizey > screen.height - 150) sizey = screen.height - 120;
if (sizex < 400) sizex = 500;
if (sizey < 250) sizex = 350;
var center1=screen.width/2 - sizex/2;
var center2=screen.height/2 - sizey/2;
var params = "width="+sizex+",height="+sizey+",left="+center1+",top="+center2+",location=no,menubar=no,status=yes,toolbar=no,scrollbars=yes";
	var w = window.open(url, '', params);
	return true;
}

function focusRow(rowId) {
	// Podswietla wiersz w tabeli z placowkami...
	var table = document.getElementById('placowki');
	var test;

	for(var i = 0; i < table.rows.length; i++) {
		if ((table.rows[i].className.match('focused') != null) && (table.rows[i].id != rowId)) {
			// Zdjecie focus'a z tego wiersza...
			table.rows[i].className = table.rows[i].className.split(' ')[0];
		} // eof if()
	} // eof for()

	document.getElementById(rowId).className = document.getElementById(rowId).className + ' focused';
} // eof focusRow()