hpricot:Hpricot::Elements#remove_attr
>> require "hpricot" => true >> doc = Hpricot('<img src="foo.png" width=200><img src="bar.png">') => #<Hpricot::Doc {emptyelem <img src="foo.png" width="200">} {emptyelem <img src="bar.png">}> >> (doc / "img").remove_attr("width") => #<Hpricot::Elements[{emptyelem <img src="foo.png">}, {emptyelem <img src="bar.png">}]> >> doc.to_html => "<img src=\"foo.png\" /><img src=\"bar.png\" />"