Javascript 如何使用javascript将文本框中输入的日期与当前日期进行比较？
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how to compare the date entered in textbox to the current date using javascript?
提问by akhil
How can I check that the date entered in a textbox is less than today's date using java script?
如何使用java脚本检查文本框中输入的日期是否小于今天的日期？
I m using code
我正在使用代码
var currentDate_Month = new Date().valueOf().getMonth();
var currentDate_Date = new Date().getDate();
var currentDate_Year = new Date().getFullYear();
var EnterDate_Month = new Date(document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived').value).getMonth();
var EnterDate_Date = new Date(document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived').value).getDate();
var EnterDate_Year = new Date(document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived').value).getFullYear();
if(EnterDate_Year<currentDate_Year) {
if(EnterDate_Month<currentDate_Month) {
if(EnterDate_Date<currentDate_Date) {
}
}
}
else {
str += '</br>* Date should be Less than or equals to current Date.';
return false;
}
But to my surprise the current date coming in the textbox control is Sat Jun 7 2014 when viewing it by -
但令我惊讶的是，当通过以下方式查看时，文本框控件中的当前日期是 2014 年 6 月 7 日星期六 -
new Date(document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived').value).toDateString();
Why is it returning the date in this format? (the date in text box is in format dd/mm/yyyy)
为什么它以这种格式返回日期？（文本框中的日期格式为 dd/mm/yyyy）
thanks in advance.
提前致谢。
回答by svanryckeghem
You could simplify your code:
你可以简化你的代码：
var today = new Date();
var enterDate = new Date(Date.Parse(document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived')));
if (enterDate.valueOf() < today.valueOf())
{
// To what you have to do...
}
回答by Jacob George
A Date() can be initialized as
一个 Date() 可以被初始化为
Date("mm/dd/yyyy")
Since this is the adopted method, the format of dd/mm/yyyy is not possible. The best method in your case will be to do the following
由于这是采用的方法，因此无法使用 dd/mm/yyyy 格式。在您的情况下，最好的方法是执行以下操作
dateFields = (document.getElementById('ctl00_ContentPlaceHolder1_txtDateReceived').value.split('/')
date = Date(dateFields[2],dateFields[1]-1, dateFields[0])
This would be in the format
这将是格式
Date(year, month, date)
Then, you can compare the textbox date with the present date
然后，您可以将文本框日期与当前日期进行比较
date < Date.now()
