//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 (id != o.id) {
			t.className = "hide";
			if ((i != 7))
			// if ((i != 5))
			{
				s.style.display = "none";
			}
		} else {
			if ((i != 7)) {
				// if ((i != 5)) {
				s.style.display = "block";
				document.getElementById("nav7").className = "hide";
			}
		}
	}
}
// 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;
		0
	}
	return true;
}