javascript - Hiding input doesnt work -

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<input type="checkbox" name="avatarfileselected" value="image"         id="avatarfileselected" onclick="$('#extra').hide('slow')"/> <span style="color:#538f05;">change image</span> <div id="extra">     <input type="file" name="avatarfile" id="avatarfile"></input> </div>

the above code doesn't work. show me mistakes?

you didn't include jquery...

use vanilla javascript:

onclick="document.getelementbyid('extra').style.display = 'none'";

instead of:

onclick="$('#extra').hide('slow')"

(or include jquery if want use it.)

btw, <input> doesn't have closing tag: </input>

replace:

<input type="file" name="avatarfile" id="avatarfile"></input>

with:

<input type="file" name="avatarfile" id="avatarfile" />

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