function llogin(form) {
var userid=form.uzivatel_userid.value;
var passwd=form.uzivatel_password.value;
if ( !userid ) {
	alert("Vložte přihlašovací jméno");
	form.uzivatel_userid.focus();
	form.uzivatel_userid.blur();
	form.uzivatel_userid.select();
    return false;
	}
if ( !passwd ) {
	alert("Vložte heslo");
	form.uzivatel_password.focus();
	form.uzivatel_password.blur();
	form.uzivatel_password.select();
    return false;
	}
}

// okna

function windowprispevek(a) {
window.open (a, 'char', 'toolbar=no, menubar=no, location=no, directories=no, scrollbars=yes, resizable=yes, status=yes, width=500, height=500, top=80, left=70');
}

// radek tabulky seznamu

function highlight0(a) {
a.style.backgroundColor='#bdbdbd';
}

function highlight1(a) {
a.style.backgroundColor='#cccccc';
}

function highlight00(a) {
a.style.backgroundColor='#a9a9a9';
}

function highlight11(a) {
a.style.backgroundColor='#999999';
}

function externalLinks() {
 if (!document.getElementsByTagName) return;
 var anchors = document.getElementsByTagName("a");
 for (var i=0; i<anchors.length; i++) {
   var anchor = anchors[i];
   if (anchor.getAttribute("href") &&
       anchor.getAttribute("rel") == "external")
     anchor.target = "_blank";
 }
}
window.onload = externalLinks;