嗨,我基本上是在尝试从另一个输入字段(日期)将日期设置为今天的情况下禁用另一个输入字段.我似乎无法强制将onchange强制输入字段并将该值转换为变量以完成此工作.

我已经成功地将onchange(this)放到了输入字段上,但是我必须将其取出并强制将JS onchange放到它上面.

我已经尝试了以下代码.如您所见,应该在上午10点以上并将日期选择为今天时执行某些操作：

<script>
    var date = new Date();
    var dd = date.getDate();
    var mm = date.getMonth()+1;
    var yyyy = date.getFullYear();
    var hrs = date.getHours();

    if(dd<10) {
        dd='0'+dd
    } 

    if(mm<10) {
        mm='0'+mm
    }

    date = yyyy+'-'+mm+'-'+dd;


    var userDateEntry = document.getElementById("fm_deliverydate").onchange().value;

    if (hrs >= 10 && userDateEntry == date) {
        alert("Shipping for today has ended. Your order will arrive tomorrow");
        document.getElementById('fm_deliverytime').disabled= true;
    }
    else{
        document.getElementById('fm_deliverytime').disabled= false;
    }
</script>

<input  type="date" name="DateName" id="fm_deliverydate" />

<input  type="time" name="TimeName" id="fm_deliverytime" />

解决方法:

您未正确附加事件.您可以使用addEventListener附加事件.

小提琴：http://jsfiddle.net/AtheistP3ace/125jnvwp/1/

var date = new Date();
var dd = date.getDate();
var mm = date.getMonth() + 1;
var yyyy = date.getFullYear();
var hrs = date.getHours();

if (dd < 10) {
    dd = '0' + dd
}

if (mm < 10) {
    mm = '0' + mm
}

date = yyyy + '-' + mm + '-' + dd;

var userDateEntry = document.getElementById("fm_deliverydate");
userDateEntry.addEventListener('change',
    function () {
        if (hrs >= 10 && userDateEntry.value == date) {
            alert("Shipping for today has ended. Your order will arrive tomorrow");
            document.getElementById('fm_deliverytime').disabled = true;
        } else {
            document.getElementById('fm_deliverytime').disabled = false;
        }
    }
);