blocks|key|4712288|text|var+a+=+'65.00'.split('.');
var+b+=+'47.09'.split('.');
a+=+a[0]+*+12+%2B+Number(a[1]);
b+=+b[0]+*+12+%2B+Number(b[1]);
c+=+a+-+b;
c+=+Math.floor(c+/+12)+%2B+(c+%25+12)+/+100;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4712289|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var a = '65.00'.split('.');
var b = '47.09'.split('.');
a = a[0] * 12 + Number(a[1]);
b = b[0] * 12 + Number(b[1]);
c = a - b;
c = Math.floor(c / 12) + (c % 12) / 100;
</code></pre>

blocks|key|2982231|text|看看DateJS：http://code.google.com/p/datejs/wiki/APIDocumentation|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2982232|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/datejs/wiki/APIDocumentation^0|9|1H|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Have a look at DateJS: <a href="http://code.google.com/p/datejs/wiki/APIDocumentation" rel="nofollow">http://code.google.com/p/datejs/wiki/APIDocumentation</a>

blocks|key|2551054|text|你用小数计算的方法是行不通的！coz，JS把它当作一个数字，而不是一个日期..|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2551055|要计算年份或月份(基本上是任何时间/日期系统)，您需要正确的语法。语法的Visit+this|offset|length|2551056|希望这对你有用|2551057|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ee532932%2528v=vs.94%2529.aspx^0|0|10|A|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

The way you are calculating with decimals will not work! coz, JS consider that as a number not as a date..

To calculate Years or Months (basically any time/date system), you require the proper syntax.
<a href="http://msdn.microsoft.com/en-us/library/ee532932%28v=vs.94%29.aspx" rel="nofollow">Visit this</a> for the syntax

Hope this will work for you

blocks|key|2982311|text|只需将月份部分转换为常规小数(除以12)，进行数学运算，然后将小数部分转换回月份(乘以12)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2982312|您必须使用类似于var+bits+=+Value1.split(".");的内容来解析这些内容。年份为bits[0]，月份为bits[1]。|offset|length|style|CODE|2982313|例如，47.09应该是47+%2B+(9+/+12+=+0.75)+=+47.75。|2982314|所以65+-+47.75+=+12.25。|2982315|将小数部分转换回月份：0.25+*+12+=+0.3。所以答案是47.03。|2982316|entityMap^0|0|8|T|1F|7|1Q|7|0|3|5|B|S|0|2|I|0|B|F|W|5|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@$D|R|E|S|F|G]|$D|T|E|U|F|G]|$D|V|E|W|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@$D|Y|E|Z|F|G]|$D|10|E|11|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|12|8|@$D|13|E|14|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|15|8|@$D|16|E|17|F|G]|$D|18|E|19|F|G]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|O|$]]

Just convert the month portion to regular decimal (divide by 12), do the maths, then convert the decimal fraction back to months (multiply by 12). 

You'll have to parse the bits out with something like <code>var bits = Value1.split(".");</code>. The year would be <code>bits[0]</code> and month <code>bits[1]</code>. 

E.g. <code>47.09</code> would be <code>47 + (9 / 12 = 0.75) = 47.75</code>.

So <code>65 - 47.75 = 12.25</code>. 

Convert decimal fraction part back to months: <code>0.25 * 12 = 0.3</code>. So answer is <code>47.03</code>.

blocks|key|4621953|text|JavaScript+doesn’t+support+operator+overloading，所以我不认为您能够找到一个解决方案，允许您使用年/月复合值的%2B和-。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4621954|但是，您可以使用add和subtract方法定义自己的year/month对象类型：|4621955|function+YearsMonths(years,+months)+{
++++this.years+=+years;

++++if+(months+>+11)+{
++++++++this.years+=+this.years+%2B=+Math.floor(months/12);
++++++++this.months+=+months+%25+12;
++++}
++++else+{
++++++++if+(months+<+0)+{
++++++++++++this.months+=+12+%2B+(months+%25+-12);
++++++++++++this.years+-=+(Math.floor(months/-12)+%2B+1);
++++++++}
++++++++else+{
++++++++++++this.months+=+months;
++++++++}
++++}
}

YearsMonths.prototype.add+=+function+(otherYearsMonths)+{
++++newYears+=+this.years+%2B+otherYearsMonths.years;
++++newMonths+=+this.months+%2B+otherYearsMonths.months;

++++return+new+YearsMonths(newYears,+newMonths);
}

YearsMonths.prototype.subtract+=+function+(otherYearsMonths)+{
++++var+newYears+=+this.years+-+otherYearsMonths.years,
++++++++newMonths+=+this.months+-+otherYearsMonths.months;

++++return+new+YearsMonths(newYears,+newMonths);
}|code-block|syntax|javascript|4621956|然后像这样使用它：|4621957|value1+=+new+YearsMonths(65,+0);
value2+=+new+YearsMonths(47,+9);

value3+=+value1.subtract(value2);
value4+=+value1.add(value2);

value3.years;
#+17
value3.months;
#+3

value4.years;
#+112
value4.months;
#+9|4621958|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4700085/can-i-define-custom-operator-overloads-in-javascript^0|26|1|28|1|0|1B|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|6|7|16|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|17|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|18|8|@]|D|@]|E|$]]|$1|O|3|P|5|J|7|19|8|@]|D|@]|E|$K|L]]|$1|Q|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]]]

<a href="https://stackoverflow.com/questions/4700085/can-i-define-custom-operator-overloads-in-javascript">JavaScript doesn’t support operator overloading</a>, so I don’t think you’ll be able to find a solution that allows you to literally use <code>+</code> and <code>-</code> with composite year/month values.

However, you could define your own year/month object type with add and subtract methods:

<pre><code>function YearsMonths(years, months) {
 this.years = years;

 if (months &gt; 11) {
 this.years = this.years += Math.floor(months/12);
 this.months = months % 12;
 }
 else {
 if (months &lt; 0) {
 this.months = 12 + (months % -12);
 this.years -= (Math.floor(months/-12) + 1);
 }
 else {
 this.months = months;
 }
 }
}

YearsMonths.prototype.add = function (otherYearsMonths) {
 newYears = this.years + otherYearsMonths.years;
 newMonths = this.months + otherYearsMonths.months;

 return new YearsMonths(newYears, newMonths);
}

YearsMonths.prototype.subtract = function (otherYearsMonths) {
 var newYears = this.years - otherYearsMonths.years,
 newMonths = this.months - otherYearsMonths.months;

 return new YearsMonths(newYears, newMonths);
}
</code></pre>

And then use it like this:

<pre><code>value1 = new YearsMonths(65, 0);
value2 = new YearsMonths(47, 9);

value3 = value1.subtract(value2);
value4 = value1.add(value2);

value3.years;
# 17
value3.months;
# 3

value4.years;
# 112
value4.months;
# 9
</code></pre>

blocks|key|2982391|text|你可以试试这个。它主要检查你的数字是年份还是包含月份。该脚本只是一个模板，您可以继续并改进它，在其中创建一个函数，或者定义您自己的原型。只需检查代码，希望它能有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2982392|http://jsfiddle.net/6pRGv/|offset|length|2982393|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|Q|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Here you can try this. It basically checks if your numbers are just years or if they contain months. The script is just a template, you can continue it and improve it, create a function out of it, or define your own prototype. Just check the code, hope it helps.

<a href="http://jsfiddle.net/6pRGv/" rel="nofollow">http://jsfiddle.net/6pRGv/</a>

We have a Year/Month HTML control. The underlying value is kept as a decimal.
For Example: 15 year and 2 months is equal to "15.02".

We want to do calculations based on 2 year/month controls (add/substract).

Just doing basic math calculations doesn't work:

<pre><code> Value1 : 65.00
 Value2 : 47.09
 65.00 - 14.09 = 17.91 

 (is wrong, but should be 17.03 or (64.12 - 47.09))
</code></pre>

Are there any Javscript/Jquery functions for that or a library that I can use to do Year / Month calculations ?

How to do Year / Month Calculations in Javascript?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我们有一个年/月的HTML控件。基础值保留为小数。例如:15年零2个月等于15.02。我们想要基于2年/月的控件(加/减)进行计算。仅仅做基本的数学计算是行不通的：  Value1 : 65.00  Value2 : 47.09  65.00 - 14.09 = 17.91  (is wrong, but should be 17.03 or (64.12 - 47.09))有没有什么Javscr

问如何在Javascript中进行年/月计算？
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