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Calculating age automatically by Javascript function?

Hi guys,

I am developing a form in which I get Date of Birth as an input by the user. Now, once the DOB is entered by the user, I want a javascript function which automatically calculates the age on 1st Sepetember of [i]this year[/i] (that is of 1st September of cuurent year, current year may be 2004/2005/2006…etc)

Here is the code, which takes DOB as an input.
Kindly help me in this regard.

Bye
Viki. [JS newebie]

[code]
<tr>
<td width=”25%” valign=”top” bgcolor=”FFCC00″ height=”12″><font face=”Arial” size=”3″> Date of Birth</font>
</td>

<td>

<select name=”Day”>
<option value=”Day” selected>Day
<option value=”1″>1</option>
<option value=”2″>2</option>
<option value=”3″>3</option>
<option value=”4″>4</option>
<option value=”5″>5</option>
<option value=”6″>6</option>
<option value=”7″>7</option>
<option value=”8″>8</option>
<option value=”9″>9</option>
<option value=”10″>10</option>
<option value=”11″>11</option>
<option value=”12″>12</option>
<option value=”13″>13</option>
<option value=”14″>14</option>
<option value=”15″>15</option>
<option value=”16″>16</option>
<option value=”17″>17</option>
<option value=”18″>18</option>
<option value=”19″>19</option>
<option value=”20″>20</option>
<option value=”21″>21</option>
<option value=”22″>22</option>
<option value=”23″>23</option>
<option value=”24″>24</option>
<option value=”25″>25</option>
<option value=”26″>26</option>
<option value=”27″>27</option>
<option value=”28″>28</option>
<option value=”29″>29</option>
<option value=”30″>30</option>
<option value=”31″>31</option>
</select>

<select name=”Month”>
<option value=”Day” selected>Month
<option value=”Jan”>Jan</option>
<option value=”Feb”>Feb</option>
<option value=”Mar”>Mar</option>
<option value=”Apr”>Apr</option>
<option value=”May”>May</option>
<option value=”Jun”>Jun</option>
<option value=”Jul”>Jul</option>
<option value=”Aug”>Aug</option>
<option value=”Sep”>Sep</option>
<option value=”Oct”>Oct</option>
<option value=”Nov”>Nov</option>
<option value=”Dec”>Dec</option>
</select>

<select name=”Year”>
<option value=”Day” selected>Year
<option value=”1998″>2000</option>
<option value=”1998″>1999</option>
<option value=”1998″>1998</option>
<option value=”1997″>1997</option>
<option value=”1996″>1996</option>
<option value=”1995″>1995</option>
<option value=”1994″>1994</option>
<option value=”1993″>1993</option>
<option value=”1992″>1992</option>
<option value=”1991″>1991</option>
<option value=”1990″>1990</option>
</select>

</td>
</tr>

<tr>
<td>
<p width=”45%”> “Age calculated automatically by Javascript function on 1st September 2004 is: [b]Years/Months/Days[/b] ” </p>
</td>
</tr>
[/code]

to post a comment
JavaScript

4 Comments(s)

Copy linkTweet thisAlerts:
@PittimannJul 19.2004 — Hi!

Just a quick and dirty modification of an existing script:

http://www.pit-r.de/scripts/dateandtime/calculateAge.htm

Sorry for having left the chance to choose years before 1990; I was born a bit earlier and want to be able to select my year of birth (1959) as well. ?

Cheers - Pit
Copy linkTweet thisAlerts:
@VikiauthorJul 20.2004 — Hi,

Thanks Pit. I will let you know once I use this script successfully.


Bye,

Viki.
Copy linkTweet thisAlerts:
@PittimannJul 20.2004 — Hi!

You're welcome! ?

Cheers - Pit
Copy linkTweet thisAlerts:
@CharlesJul 20.2004 — [font=georgia]Isn't that making things a bit harder than necessary now that the JavaScript Date object can represent dates prior to 1970?[/font]

[font=monospace]<script type="text/javascript">

<!--

Date.prototype.getAgeInYears = function () {var now = new Date(); var d = new Date(this.getTime()); d.setYear(now.getFullYear()); return d > now ? now.getFullYear() - this.getFullYear() - 1 : now.getFullYear() - this.getFullYear()}

alert (new Date('20 July 1964').getAgeInYears());

// -->

</script>[/font]
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