我写了一个像这样的剧本
function calculateDiff(){
_start = "1:00 PM";
_end = "1:00 AM";
_start_time = parseAMDate(_start);
_end_time = parseAMDate(_end);
if (_end_time < _start_time){
_end_time = parseAMDate(_end,1);
}
var difference= _end_time - _start_time;
var hours = Math.floor(difference / 36e5),
minutes = Math.floor(difference % 36e5 / 60000);
if (parseInt(hours) >= 0 ){
if (minutes == 0){
minutes = "00";
}
alert(hours+":"+minutes);
}
}
function parseAMDate(input, next_day) {
var dateReg = /(\d{1,2}):(\d{2})\s*(AM|PM)/;
var hour, minute, result = dateReg.exec(input);
if (result) {
hour = +result[1];
minute = +result[2];
if (result[3] === 'PM' && hour !== 12) {
hour += 12;
}
}
if (!next_day) {
return new Date(1970, 01, 01, hour, minute).getTime();
}else{
return new Date(197var start = document.getElementById("usr1").value;
var end = document.getElementById("usr2").value;0, 01, 02, hour, minute).getTime();
}
}
这里,对于_start和_end,我已经给出了值,我希望这些值应该来自一个文本框,因为我已经编写了像
这样的代码<form action="calculateDiff()">
Select start time:<input type="time" name="usr1">
Select end time: <input type="time" name="usr2">
<input type="submit">
</form>
当我在文本框(usr1)中选择时间时,如何获得脚本功能的时间? 请帮助我
答案 0 :(得分:1)
我建议在输入字段中添加id
属性:
<form action="calculateDiff()">
Select start time:<input type="time" name="usr1" id="startTime">
Select end time: <input type="time" name="usr2" id="endTime">
<input type="submit">
</form>
现在我们可以使用document.getElementById
直接访问html元素:
var start = document.getElementById("startTime").value;
var end = document.getElementById("endTime").value;
document.getElementById("usr1")
将返回HTML文本字段对象本身,它有一些属性。其中一个是value
,表示文本字段内的内容(您甚至可以使用javascript更改它)。
在此处阅读有关输入元素的更多信息:
答案 1 :(得分:0)
试试这个
_start = document.getElementsByName('usr1')[0].value; //It will fetch the value of the first element in the DOM with the name usr1
_end = document.getElementsByName('usr2')[0].value; //It will fetch the value of the first element in the DOM with the name usr2
答案 2 :(得分:0)
你可以像这样获得输入值
var _start = document.getElementsByName("usr1")[0].value;
var _end = document.getElementsByName("usr2")[0].value;