Html Core Attributes

Prior to HTML 4.0, few attributes could be used consistently for all the HTML tags. HTML 4.0 changed this, defining a set of 16 core attributes that you can apply to almost all the elements in both HTML 4.01 and XHTML 1.0. For brevity, we list these core attributes   table that follows:
class=name
Specify a style class controlling the appearance of the tag's contents.
dir=dir
Specify the rendering direction for texteither left to right (ltr) or right to left (rtl).
id=name
Define a reference name for the tag that is unique in the document.
lang=language
Specify the human language for the tag's contents with an International Organization for Standardization (ISO) 639 standard two-character name and optional dialect subcode.
onclick=applet
Specify an applet to be executed when the user clicks the mouse on the tag's content display area.
ondblclick=applet
Specify an applet to be executed when the user double-clicks the mouse button on the tag's content display area.
onkeydown=applet
Specify an applet to be executed when the user presses down on a key while the tag's contents have input focus.
onkeypress=applet
Specify an applet to be executed when the user presses and releases a key while the tag's contents have focus.
onkeyup=applet
Specify an applet to be executed when the user releases a pressed key while the tag's contents have focus.
onmousedown=applet
Specify an applet to be executed when the user presses down on the mouse button while pointing to the tag's content display area.
onmousemove=applet
Specify an applet to be executed when the user moves the mouse in the tag's content display area.
onmouseout=applet
Specify an applet to be executed when the user moves the mouse off the tag's content display area.
onmouseover=applet
Specify an applet to be executed when the user moves the mouse into the tag's content display area.
onmouseup=applet
Specify an applet to be executed when the user releases the mouse button while in the tag's content display area.
style=style
Specify an inline style for the tag.
title=string
Specify a title for the tag.