HTMLHelp Forums > javascript auto calcuate value based on user input

Full Version: javascript auto calcuate value based on user input

HTMLHelp Forums > Programming > Client-side Scripting

potato_chip

Oct 27 2008, 01:56 PM

Hey, I need some help here on javascript functions:

here is what I want to do. I want user to enter the start time and end time, once both fields are entered, the total work hours field will be calculated and showed automatically.

below is my simple html code:

CODE

<table border="1" cellspacing="0" cellpadding="2">
<tr><td>Start Time</td><td>End Time</td><td>Hours</td></tr>
  <tr>
      <td><input type="text" name="startTime" /></td>
    <td><input type="text" name="endTime" /></td>
    <td><input name="text" disabled="disabled"/></td>
  </tr>
</table>

I'm really new to Javascript. Any help is greatly appreciated!

Darin McGrew

Oct 27 2008, 02:59 PM

I'm not very experienced with JavaScript either, but I suggest that you break down the problem into small steps and figure out how to do each in turn:

display the start time
display the end time
display just the hours of the start and end time
display just the minutes of the start and end time
determine whether the start time is before the end time, and display an appropriate message
etc.

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