[HTML] pobierz, plaintext 
<script type="text/javascript">
<!--
function promptIfEmpty(number){
	konto=document.getElementsByName("konto["+number+"]");
	if(konto[0].value==""){
		alert("Osz Ty!");
		return false;
	}
	return true;
}
//-->
</script>
 
[...]
 
 
<input type="text" name="konto[1]" id="konto[1]" value="">
<input type="checkbox" name="strona[1]" onclick="return promptIfEmpty(1);" onkeypress="return promptIfEmpty(1);">
<input type="text" name="haslo[1]" value="" onkeypress="return promptIfEmpty(1);">
 
<input type="text" name="konto[2]" id="konto2]" value="">
<input type="checkbox" name="strona[2]" onclick="return promptIfEmpty(2);" onkeypress="return promptIfEmpty(2);">
<input type="text" name="haslo[2]" value="" onkeypress="return promptIfEmpty(2);">
 
[...]
[HTML] pobierz, plaintext