function validForm(form){
	aa = form.getElementsByTagName("input");
	outputText = "";
	isFalse = false;
	for(var i=0;i<aa.length;i++){
		if(aa[i].className == "mandratory" || aa[i].className == "error"){
			if((aa[i].value).length == 0){
				aa[i].className = 'error';
				isFalse = true;
			}else{
				aa[i].className = 'mandratory';
			}
		}
	}
	if(isFalse){
		alert('Musíte vyplnit všechny položky.');
		return false;
	}else{	
		return true;
	}
}

// pro kdyz se detail zobrazuje v jinem okne
function addToList(id){
	window.location='index.php?action=addToShoppingList&pid='+id;
}