[xwiki-users] Display HTML Download Button with xwiki download link

[Hofstätter Mario]

I'd like to display a simple download button with a certain text, which 
downloads a file attached to this xwiki page when clicked. The link has to be 
relative to the current page (file is attached there).
I tried the following variations of the html macro with no success. Is it 
possible? Otherwise we will just create images for download buttons and links 
on them.

(xwiki 8.4.3)

{{html wiki="true"}}
<form action="">
    <input type="submit" value="[[Download>>attach:SomeFile.png]]"/>
</form>
{{/html}}

{{html wiki="true"}}
<form action="[[Download>>attach:SomeFile.png]]">
    <input type="submit" value="Download"/>
</form>
{{/html}}

{{html}}
<form action="WebHome/Trendset_Dialog.png">
    <input type="submit" value="[[Download>>attach:SomeFile.png]]"/>
</form>
{{/html}}

{{html wiki="true"}}
<button type="button" onclick="[[attach:SomeFile.png]]">Download</button>
{{/html}}

{{html}}
<button type="button" onclick="WebHome/Trendset_Dialog.png">Download</button>
{{/html}}

Thanks.