Button in html

[cliftonite]

How can I capture a button click in HTML? Writing a script that by default prints the last 500 lines of a log file (this works fine). Now I need a button that will enable someone to view the next 500 lines. How can I capture this? Isnt the button syntax something like:

<INPUT TYPE='button' NAME='Next500lines' VALUE=?' So what would I change that would trigger the loop? Is there anyway to make it a boolean and check if (button) then blah blah, else blah ? Thanks for the help.

 

[Crusty]

you would use the onClick property followed by some javascript

onClick="javascript:myfunction()"

 

[cliftonite]

Originally posted by: MCrusty
you would use the onClick property followed by some javascript

onClick="javascript:myfunction()"

The script is in perl. So would I have to write a javascript function to evaluate the click? And then have perl read that?

 

[Crusty]

It sounds like you don't really care if someone clicks the button, you really want someone to submit a form.

So you want to do
<form method=post name="nextrows" action="myscript.pl">
<input type=submit value="Next Rows" name="button">
</form>

So when someone clicks on the button(submitting the form) it will perform the action specified as in, goto myscript.pl and passing the values of the form using the post method.

 

[cliftonite]

Originally posted by: MCrusty
It sounds like you don't really care if someone clicks the button, you really want someone to submit a form.

So you want to do
<form method=post name="nextrows" action="myscript.pl">
<input type=submit value="Next Rows" name="button">
</form>

So when someone clicks on the button(submitting the form) it will perform the action specified as in, goto myscript.pl and passing the values of the form using the post method.

Well I dont really need a form because there is nothing to input but I just want to know when the user has hit a button, so that i can display the next 500 lines.


<p>MACID: <input type ="text" name="macid" MAXLENGTH="12"/></p>
<p><input type="submit" value="Search" /></p>
<p><input type="reset" value="Clear"/></P>


That was the form I used to get the macid. The the following code took the form input and appended it to the file format.

my $macid = $query->param('macid');

if ($macid) {
if($macid =~m/[0-9A-Fa-f]{12}/)
{
$mactxt = uc($macid).".txt";
$mtamac ="Mta" .lc($macid);
}

else {
print "Please enter a correct MAC ID", "\n";
exit;
}
}


what i need is a something like my $macid = $query->param('macid'); in perl to check if the button was pushed that way I can execute the code to print another 500 lines.

 

[cliftonite]

up

 

[Crusty]

The easiest way to detect when they hit the button is to use a form. Otherwise you have depend on javascript, which can get messy depending on the software platforms you are working with.

 

[cliftonite]

<form method=post name="next500" action="myscript.pl">
<input type=submit value="next500" name="button">
</form>

but how would I detect that? if (my $macid = $query->param('next500'); would work? kind of like a boolean?

 

[Crusty]

I'm not sure how you would detect it in perl, but do some googling.

Try html perl forms, that should get you quite a few good sites with LOTS of examples.

 

[royaldank]

Add a hidden tag in your form and then just check for that value. That would be the quickest way without having to implement any Java.
<input type="hidden" name="view" value="next500">