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OALDERS / WWW-Mechanize-1.83 / t / form_with_fields.html 
<html>
<body>

<form action="http://localhost/" method="post" enctype="multipart/form-data" name="1st_form">
    <input type="text" name="1a"  />
    <input type="text" name="1b"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

<form action="http://localhost/" method="post" name="2nd_form">
    <input type="text" name="opt[2]"  /> Like in PHP!
    <input type="text" name="1b"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

<form action="http://localhost/" method="post" enctype="multipart/form-data" name="3rd_form_ambiguous">
    <input type="text" name="3a"  />
    <input type="text" name="3b"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

<form action="http://localhost/" method="post" enctype="multipart/form-data" name="3rd_form_ambiguous">
    <input type="text" name="3c"  />
    <input type="text" name="3d"  />
    <input type="text" name="x"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

<form action="http://localhost/" method="post" enctype="multipart/form-data" name="4th_form_1">
    <input type="text" name="4a"  />
    <input type="text" name="4b"  />
    <input type="text" name="x"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

<form action="http://localhost/" method="post" enctype="multipart/form-data" name="4th_form_2">
    <input type="text" name="4a"  />
    <input type="text" name="4b"  />
    <input type="text" name="x"  />
    <input type="Submit" name="submit" value="Submit" label="Sumbit" />
</form>

</body>