Javascript编码：输入具体日期，输出季节 [英] Javascript coding: Input a specific date, Output the season
问题描述
< body>
< h1>到季节的日期< / h1>
< p align =left>输入日期：
< input id =seasonmaxlength =4size =24/>
< / p>
< input type =buttonvalue =Submitonclick =Submit（）/>< br />
< textarea cols =40rows =3id =output>< / textarea>< / body>
< script type =text / javascript>
function Submit（）{
var date = document.getElementById（'season'）。value;
var seasons =
if（
请注意，有这样做的更为简单的方法（例如，使用例如日期对象），这可能更有用/更灵活，特别是如果要根据实际的季节开始/停止日期（例如3月28日），这只是为了展示出发点。
这是一个非常简单的例子，使用swtich（）根据一个数字月份：
< form name =date>
< input type =text name =month/>
< input type =buttonvalue =Season？onClick =getSeason（）/>
< / form>
function getSeason（）{
month = document.forms.date.month.value;
season ='';
switch（month）{
case'12' ：
case'1'：
case '2'：
season ='winter';
break;
case'3'：
case'4'：
case'5'：
season ='spring';
break;
case'6'：
case'7'：
case'8'：
season ='summer';
break;
case'9'：
case'10'：
case'11'：
season ='fall';
break;
}
alert（season）;
}
这里有一个更复杂的例子，显示短/长的月份加上数字月。
http://jsfiddle.net/ RtC58 / 1 /
function getSeason（）{
month = document.forms.date.month .value.toLowerCase（）;
season ='unknown';
switch（month）{
case'dec'：
case'december'：
case'12'：
case'jan'：
case 'january'：
case'1'：
case'feb'：
case'february'：
case'2'：
season ='winter'
break;
case'mar'：
case'march'：
case'3'：
case'apr'：
case'april'：
'4'：
case'may'：
case'5'：
season ='spring';
break;
case'jun'：
case'june'：
case'6'：
case'jul'：
case'july'：
case '7'：
case'aug'：
case'august'：
case'8'：
season ='summer';
break;
case'sep'：
case'september'：
case'9'：
case'oct'：
case'october'：
case '10'：
case'nov'：
case'november'：
case'11'：
season ='fall';
break;
}
alert（season）;
}
有一点不同的方法可能是为季节创建变量，使用if / else语句（如OP想要的一个例子），并在其中一个变量中找到index的月份值（注意我添加了一个， [逗号]到月底，消除1从12和1从0，等...）。
function getSeason（）{
month = document.forms.date.month.value.toLowerCase（）+，;
winter ='dec，十二月，jan，january，feb，二月，12,1,2'
spring ='mar，march，apr，april，may，3,4,5，';
summer ='jun，june，jul，july，aug，august，6,7,8，';
fall ='sep，9月，oct，10月，nov，11月9,10,11'
season ='unknown';
if（winter.indexOf（month）！= -1）{
season ='winter';
} else if（spring.indexOf（month）！= -1）{
season ='spring';
} else if（summer.indexOf（month）！= -1）{
season ='summer';
} else if（fall.indexOf（month）！= -1）{
season ='fall';
}
alert（season）;
}
Hello I a very new to Javascript and I need to make a code that allows someone to enter a date and it will result in the season that date is in. I am at a loss at what I should do, an if else statement? This is as far as I got, thank you for everyone's time!
<body>
<h1>Date to Season</h1>
<p align="left">Enter Date:
<input id="season" maxlength="4" size="24"/>
</p>
<input type="button" value="Submit" onclick="Submit()"/><br/>
<textarea cols="40" rows="3" id="output"></textarea></body>
<script type="text/javascript">
function Submit(){
var date = document.getElementById('season').value;
var seasons =
if (
Note, there are saner ways of doing this (for instance, using a date object for instance), that would probably be more useful/flexible, especially if you want to determine by the actual season start/stop date (March 28th, for example). This is just to demonstrate a starting point.
Here's a very simple example, using a swtich() to return a season according to a numeric month:
<form name="date">
<input type="text" name="month"/>
<input type="button" value="Season?" onClick="getSeason()"/>
</form>
function getSeason() {
month = document.forms.date.month.value;
season = '';
switch(month) {
case '12':
case '1':
case '2':
season = 'winter';
break;
case '3':
case '4':
case '5':
season = 'spring';
break;
case '6':
case '7':
case '8':
season = 'summer';
break;
case '9':
case '10':
case '11':
season = 'fall';
break;
}
alert(season);
}
Here's a little bit more complex example, showing the short/long month plus the numeric month.
function getSeason() {
month = document.forms.date.month.value.toLowerCase();
season = 'unknown';
switch(month) {
case 'dec':
case 'december':
case '12':
case 'jan':
case 'january':
case '1':
case 'feb':
case 'february':
case '2':
season = 'winter';
break;
case 'mar':
case 'march':
case '3':
case 'apr':
case 'april':
case '4':
case 'may':
case '5':
season = 'spring';
break;
case 'jun':
case 'june':
case '6':
case 'jul':
case 'july':
case '7':
case 'aug':
case 'august':
case '8':
season = 'summer';
break;
case 'sep':
case 'september':
case '9':
case 'oct':
case 'october':
case '10':
case 'nov':
case 'november':
case '11':
season = 'fall';
break;
}
alert(season);
}
A little bit different approach could be to create variables for the seasons, use if/else statements (as the OP wants an example of) and find the 'index of' the month value in the one of the variables (note I added a , [comma] to the end of the month to disambiguate 1 from 12 and 1 from 0, etc...).
function getSeason() {
month = document.forms.date.month.value.toLowerCase()+",";
winter = 'dec,december,jan,january,feb,february,12,1,2,';
spring = 'mar,march,apr,april,may,3,4,5,';
summer = 'jun,june,jul,july,aug,august,6,7,8,';
fall = 'sep,september,oct,october,nov,november,9,10,11,';
season = 'unknown';
if (winter.indexOf(month) != -1) {
season = 'winter';
} else if (spring.indexOf(month) != -1) {
season = 'spring';
} else if (summer.indexOf(month) != -1) {
season = 'summer';
} else if (fall.indexOf(month) != -1) {
season = 'fall';
}
alert(season);
}
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