Question

代码正在运行并使用

设置值

setCookie('newWindow', document.getElementById("myForm:header:"+1+":chekDeleted").checked? 1:0,100);

但是当我在循环中调用getElementById时，它表示类型错误

var count = 0;

for(i=1;i<totalRecords;i++)
{
    var chkBox = getElementById("myForm:header:"+i+":chekDeleted");
    if(chkBox.checked == true)
    {
        count++;
        if(count > 1)
        {
            setCookie('newWindow', document.getElementById("myForm:header:"+i+":chekDeleted").checked? 1:0,100);

        }
    }
}

Answer 1

尝试添加document.：

for(i=1;i<totalRecords;i++)
{
        var chkBox = document.getElementById("myForm:header:"+i+":chekDeleted");
    if(chkBox.checked == true)
    {
        count++;
        if(count > 1)
        {
            setCookie('newWindow', document.getElementById("myForm:header:"+i+":chekDeleted").checked? 1:0,100);

        }
    }
}

如果仍然有错误，那是因为没有加载带有这些ID的元素。在这种情况下，chkBox会返回null而if(chkBox.checked == true)会返回错误未捕获的TypeError：无法读取属性'已检查'为空

键入Error：getElementById..null with h：selectBooleanCheckbox

1 个答案: