function prihlaseni(url) {
var w=350;
var h=280;
var windowfeatures='toolbar=no, scrollbars=no, resizable=no, menubar=no';
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl;
win = window.open(url, "prihlaseni", winprops, windowfeatures)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}

function email(url) {
		window.open(url,"email","left=0, top=0, width=640 height=400 resizable=yes scrollbars=yes")
}