function over_udaje(f){
	//alert('test');
	//alert(f.meno.value);
	
	if(f.meno.value.length < 1){
		alert("musite zadat meno"); f.meno.focus(); return;
	}
	if(f.heslo.value.length < 5){
		alert("musite zadat min. 5 znakov heslo"); f.heslo.focus(); return;
	}
	if(f.kod.value != 5){
		alert("musite zadat spravny kod");
		f.kod.focus();
		return;
	}
	f.submit();
}

function over_udaje_vst(f){
	if(f.login.value.length < 1){
		alert("musite zadat login"); f.login.focus(); return;
	}
	if(f.passwd.value.length < 5){
		alert("musite zadat min. 5 znakov heslo"); f.passwd.focus(); return;
	}
	f.submit();
}




function view_pic(img,sirka,vyska){
	leftVal = (screen.width - sirka) / 2;
	topVal = (screen.height - vyska) / 2;
	//alert(leftVal+"x"+topVal);
	//alert(screen.width+"-"+sirka);
	window.open ("./view_pic.php?file_v="+img+"","obr","location=0,status=0,scrollbars=0,width="+sirka+",height="+vyska+",left="+leftVal+",top="+topVal+" ");
}