comment on

> AFAIU this calls a js function checkform() prior to submitting.

It's a classic JS form validator, a submission is only possible if it returns true.

see e.g. https://www.w3schools.com/js/js_validation.asp

> For example, look at the B1=Submit field. Where does that come from?

I can see this with JS disabled

<input style="font-size: 13pt" type="submit" value="Submit" name="B1">

I don't have the impression JS is adding something to the form, frankly I doubt the author had the necessary skills to do so.

But my advise here can only be superficial, because I don't know what the correct genetic input has to loo like. And the author decided to let his web-service simply crash, when the JS validation is bipassed to send broke input. 🤷🏽

DISCLAIMER: I don't expect biologist to be good hackers, but academics should be capable to ask proper questions.

ANYWAY: I agree with you that this is not really a Perl issue, it's about HTML/HTTP.

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

In reply to Re^2: Correct link to put in my WWW:Mechanize by LanX
in thread Correct link to put in my WWW:Mechanize by Anonymous Monk

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


more useful options
	PerlMonks