Adding numbers in cells

[schoch]

I usually work in php and was told I could not add cells to total automatically.
I need help with javascript as I now nothing. I hope this makes sense!


I want to tally up the numbers inputted in each cell for the specific column e.g.
CODE
<input name="md1" type="text" id="md1" size="10" />
and
<input name="md2" type="text" id="md1" size="10" />
=<input name="md_total" type="text" id="md_total" size="10" value="<?php
$md1=md1;
$md2=md2;
$md_total=($md1+$md2);

echo $md_total;
?>"/>
How do I do it so it automatically adds without having to use a submit button??

 

[tsuji]

Bare minimal.

[tt]<input name="md1" type="text" id="md1" size="10" [blue]onblur="this.form.md_total.value=parseInt(this.form.md1.value,10)+parseInt(this.form.md2.value,10);"[/blue] />
and
<input name="md2" type="text" id="md[red]2[/red]" size="10" onblur="this.form.md_total.value=parseInt(this.form.md1.value,10)+parseInt(this.form.md2.value,10);" /> [red]<!-- avoid id collision as much as you can -->[/red]
=<input name="md_total" type="text" id="md_total" size="10" [blue]readonly="readonly"[/blue] />
[/tt]
But if you know nothing about client-side scripting, even this simple thing may become enough complicate in order to avoid some unplesant features of such a minimal approach.