Attributes & selectors
HTML
<input type="radio" checked data data-x data-y="" data-z="foo"/>
<p id="p"></p>
JavaScript
var a=
['[checked]',
'[data]',
'[data-x]',
'[data-y]',
'[data-z]'],
b=''
$.each(a,function(i){
try {b+=$(a[i])[0].tagName}catch(e){b+=e}
b+='<br>'
})
p.innerHTML = b