See also
Examples in JavaScript
<label value="Whaw" id="the-big-label" command="the-big-button"/>
<button id="the-big-button" label="Click me"
oncommand="alert(document.getElementById('the-big-label').value)"/>
<label id="myLabel" value="My label"/>
<button label="Click me"
oncommand="document.getElementById('myLabel').setAttribute('value','Value changed');" />
<checkbox label="my Checkbox" id="myCheckboX"/>
<button label="Another click"
oncommand="document.getElementById('myCheckboX').setAttribute('label','Still not checked');"/>
<button label="Show label of checkbox"
oncommand="alert( document.getElementById('myCheckboX').getAttribute('label') )"/>