复选框 checkbox获取值

判断是否有选择值：

 var count = 0;
    $("input[name=subBox]:checkbox:checked").each(function () {
        count++;
    })

获取选择的值： 

var contract = $("input[name=subBox]:checkbox:checked").val();

代码：

   页面

<td class="table-check"><input name="subBox" type="checkbox" value="{{= contract}}" onclick='countNum(this);'></td>

  js 

function checkdownContract() {
    var count = 0;
    $("input[name=subBox]:checkbox:checked").each(function () {
        count++;
    })
    if (count == 0 || count > 1) {
        if (count == 0) {
            alert("请选择");
        } else {
            alert("一次只能选择一个下载");
        }
        return false;
    }
    //../../../loanQuery/downSingWithContract
    if (count == 1) {
        var contract = $("input[name=subBox]:checkbox:checked").val();
        window.location.href = "../../../loanQuery/downSingWithContract?contract=" + contract;
        return false;
    }
}