我想要“输入日期”它采用文本格式，采用日期格式 [英] I want the "input date" that is in a text format to be in a date format
问题描述
我建立一个计算孕妇周和日的acalculater。
输入是文本格式
我希望它是一个日期格式。但是当我改变它时，它不计算
我尝试过：
<！DOCTYPE HTML PUBLIC - // W3C // DTD HTML 4.01 Transitional // EN>
< title> Untitled Document
< meta http-equiv =Content-Typecontent =text / html; charset = iso-8859-1> ;
< meta http-equiv =Content-Style-Typecontent =text / css>
< meta http-equiv =Content-Script-Typecontent =text / javascript>
函数calculate（f）{
var entry = f.newD.value.split（'/'）; //拆分输入值;
if（（entry.length& lt; 3）||（entry [0] .length！= 2）||（entry [1] .length！= 2）||（entry [2] .length ！= 4）||（Number（entry [0]> 31））||（Number（entry [1]> 12）））{//一些限制条件
alert（'Plese input data in格式dd / mm / yyyy！'）;
f.difD.value ='';
返回false;
}
y =条目[2] * 1;
m = entry [1] * 1-1; //将月份设置为默认值，即Jan = 0; 2月= 1;等等
d =条目[0] * 1;
var newDate = new Date（y，m，d）; //设置新日期
var today = new Date（）; //设置今天日期
dif =（今天-newDate）/ 7）-1; //以毫秒为单位的差异
dif = Math.floor（dif / 1000/60/60/24）; //天数差异
yamim1 =（（（（今天 - 新日期）/ 7）/（24 * 3600 * 1000）） - dif）* 7;
yamim1 = Math.floor（yamim1）;
if（dif& lt; 0）{//如果日期在过去的警报中（'所选日期是过去。请输入有效日期！'）;
f.difD.value ='';
返回false;
}
f.difD.value ='שבוע'+ dif +'+'+ yamim1 +'ימים'; //分配差额
}
< br>
Google是你的朋友......
1.如果您要转换为日期： javascript格式文字为日期 - Google [ ^ ]
2.如果您需要屏蔽输入： javascript date masked input - Google [ ^ ]
i build acalculater that calculates the week and day of a pregnat women. 这篇关于我想要“输入日期”它采用文本格式，采用日期格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
不要让用户输入自由格式日期字符串，而是使用日期选择器 [< a href =https://jqueryui.com/datepicker/target =_ blanktitle =New Window> ^ ]。
the input is in a text format
and i want it to be in a date format. but when i change it, it doesn't calculate
What I have tried:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<title>Untitled Document
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta http-equiv="Content-Style-Type" content="text/css">
<meta http-equiv="Content-Script-Type" content="text/javascript">
function calculate(f){
var entry = f.newD.value.split('/');//splits input value;
if((entry.length<3)||(entry[0].length!=2)||(entry[1].length!=2)||(entry[2].length!=4)||(Number(entry[0]>31))||(Number(entry[1]>12))){//some limitative conditions
alert('Plese input data in format dd/mm/yyyy !');
f.difD.value = '';
return false;
}
y=entry[2]*1;
m=entry[1]*1-1;//sets months to default values i.e Jan = 0; Feb = 1; etc.
d=entry[0]*1;
var newDate = new Date(y,m,d);//sets the new date
var today = new Date();//sets the today date
dif = ((today-newDate)/7)-1;//difference in milliseconds
dif = Math.floor(dif/1000/60/60/24);//difference in days
yamim1 =((((today-newDate)/ 7) / (24 * 3600 * 1000))-dif)*7;
yamim1 = Math.floor(yamim1);
if(dif<0){//if the date is in the past alert('The chosen date is in the past. Please input a valid date!');
f.difD.value = '';
return false;
}
f.difD.value = ' שבוע '+ dif + ' + '+ yamim1 + ' ימים ' ;//assign the difference
}
<br> Google is your friend...
1. if you want to convert to a date: javascript format text as date - Google[^]
2. If you need to mask the input: javascript date masked input - Google[^]Never do that. You cannot reliably work on Date as string. Instead, use JavaScript Dates[^]. Refer to my previous answer[^].
Instead of letting user to enter free form date string, use a date picker[^] instead.
