function menuBg(div,bgColor,obrBg){
	div.style.backgroundColor=bgColor;
	if(obrBg==1){
		if(div.style.backgroundImage=="url(obr/menu_1_n.gif)"){
			div.style.backgroundImage="url(obr/menu_1.gif)";
		}else{
			div.style.backgroundImage="url(obr/menu_1_n.gif)";
		}
	}
}
//skontrolujeme formular diskusie
function checkDisc(form){
	if(form.meno.value==""){
        alert("Zabudli ste vyplniť Vaše meno!");
        form.meno.focus();
        return false;
    }else if(form.text.value==""){
        alert("Zabudli ste vyplniť text príspevku!");
        form.text.focus();
        return false;
    }else if(form.vercode.value==""){
        alert("Zabudli ste zadat overovaci kod!");
        form.vercode.focus();
        return false;
    }else if(window.RegExp){
        re=new RegExp("^[^.]+(\.[^.]+)*@([^.]+[.])+[a-z]{2,3}$");
        if(!re.test(form.email.value) && form.email.value!="" && form.email.value!="@"){
            alert("Zadaná e-mailová adresa nie je správnou adresou elektronickej pošty!");
            form.email.focus();
            return false;
        }
    }else{
		return true;
	}
}
//ukazeme obrazok v novom okienku
function showImg(url,width,height){
	window.open(url,'_blank','width='+width+',height='+height+',toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0');
}