HTML/CSS/Object Attributes/application
"application" indicates whether or not the element points to an HTA application
<source lang="html4strict">
<HTML> <Title>Example For application</Title> <BODY> <iframe application="yes"
src="http://www.wbex.ru/style/logo.png" style="width:40%;">
</iframe> <iframe application="no"
src="http://www.wbex.ru/style/logo.png" style="width: 40%;">
</iframe> </BODY> </HTML>
</source>