//导航切换
function jeeNav(o, n){
    o.className = "selected";
    var t;
    var id;
    var s;
    for (var i = 1; i <= n; i++) {
        id = "nav" + i;
        t = document.getElementById(id);
        s = document.getElementById("sub" + i);
        if (o && o.id && id && t && s && id != o.id) {
            t.className = "hide";
            s.style.display = "none";
        }
        else {
			if(s && s.style) {
	            s.style.display = "block";
			}
        }
    }
}

//投票验证
function check_votes(allowCount){
    var voteItems = document.getElementsByName('itemIds');
    var count = 0;
    for (var i = 0; i < voteItems.length; i++) {
        if (voteItems[i].checked) {
            count++;
        }
    }
    if (count == allowCount && allowCount > 1) {
        for (var i = 0; i < voteItems.length; i++) {
            if (!voteItems[i].checked) {
                voteItems[i].disabled = true;
            }
        }
        return true;
    }
    else {
        for (var i = 0; i < voteItems.length; i++) {
            voteItems[i].disabled = false;
        }
    }
    if (count == 0) {
        alert("对不起，请至少选择一个投票项！");
        return false;
    }
    return true;
}