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HTML Attribute Index

Select a attribute to visit its documentation.
Attribute IE Netscape Mozilla Opera Safari
Abbreviation for a header cell in a table.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Name of the layer above the element.
no 4.0 no no no
 
Specifies accepted MIME types for file uploads.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Comma or space-delimited list of character encodings that are accepted by the server processing the form.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Hot-key shortcut for the element.
5.5+ no no no 1.0+
 
URL for submitting the form.
2.0 1.0+ 1.0+ 4.0+ 1.0+
 
Defines the alignment of the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies whether the background of the element may be transparent.
5.5+ no no no no
 
Specifies alternative text to display if the element cannot be displayed as expected.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies whether the content of the element is considered an HTA application.
5.0+ no no no no
 
URL or list of URLs that need to be preloaded for the element.
3.0+ 4.0+ 1.0+ 4.0+ 1.0+
 
Specifies whether form autocompletion, which automatically completes the fields on a form after the user has typed enough letters, is on or off.
5.0+ no no no 1.0+
 
Specifies a name for a group of headers.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies the URL for the background image for the document or element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Name of the layer below the element.
no 4.0+ no no no
 
Specifies the movement behavior of the element.
4.0+ no no no 1.0+
 
Specifies the background color for the document or element. Specify either a color name or RGB color.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Width (in pixels) of the border around the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies the color of the border of the element. Specify either a color name or RGB color code.
4.0+ no no no no
 
Specifies the darker color of the border of the element, if the element has a 3D effect. Specify either a color name or RGB color code.
4.0+ no no no no
 
Specifies the lighter color of the border of the element, if the element has a 3D effect. Specify either a color name or RGB color code.
4.0+ no no no no
 
Number of pixels between the content of a cell and the edge of a cell.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Number of pixels between cells.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies which character to use to set the alignment for the element.
4.0+ 1.0+ 7.0+ 1.0+
 
Number of characters to offset the other column characters from the character specified by char.
4.0+ 1.0+ 7.0+ 1.0+
 
Specifies the character set associated with the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element should be checked.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
URL for the source of the quote.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
CSS class assigned to the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies x,y coordinates of the upper left and lower right corners of the element.
no 4.0+ no no no
 
URL of the Java class file for the element.
2.0+ 2.0+ 1.0+ no 1.0+
 
URL for the code base for the element.
2.0+ 2.0+ 1.0+ no 1.0+
 
Name of the color or RGB code for the color for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Number of characters wide that the element should be.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Number of columns that the element should span.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
If true, specifies that the element should be visually compressed by compacting whitespace between its child elements.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
High-level meta description of the contents of the document.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies whether or not the content of the element is editable, or if the element inherits the value of this property from its parent.
4.0+ no no no 1.0+
 
Comma-delimited x, y coordinates for the element.
4.0+ 1.1+ 1.0+ 7.0+ 1.0+
 
Specifies the URL for data used by the element.
4.0+ 4.0+ 1.0+ 7.0+ 1.0+
 
For a databound element, specifies the field supplying the data.
4.0+ no no no no
 
Specifies whether the element treats data as plain text or as html.
4.0+ no no no no
 
For a databound element, specifies the number of records to display in the element.
4.0+ no no no no
 
For a databound element, specifies the id of the data source.
4.0+ no no no no
 
Specifies the date and time that the element was modified.
4.0+ 6.0+ 1.0+ 7.0+ 1.0+
 
If present, declares the object associated with the element, but does not instantiate it.
4.0+ 3.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that execution of the element is deferred.
3.0+ 2.0+ 1.0+ 7.0+ 1.0+
 
Direction of the element text.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies the direction of movement for the element text.
4.0+ no no no 1.0+
 
Specifies whether or not the element is disabled.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
URL of a video clip file.
4.0+ no no no no
 
Specifies the MIME type for the element data being sent to the server.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies the event handler for the element.
3.0+ no no no no
 
Name of the font. You can specify more than one font face.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Id corresponding to the form or event associated with the element.
4.0+ 1.1+ 1.0+ no 1.0+
 
Specifies which edges of the element should have a border.
2.0+ 2.0+ 1.0+ 4.0+ 1.0+
 
Specifies whether the frame has a border.
2.0+ 2.0+ 1.0+ 4.0+ 1.0+
 
Number of pixels between frames.
4.0+ no no no no
 
Specifies whether the image toolbar is visible.
6.0+ no no no no
 
Space-delimited list of header cell id's for header cells that are related to the element.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Height of the element (in pixels).
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
If true, specifies that the element is hidden.
no no no no 1.0+
 
Specifies whether the element shows a visual cue when it has focus.
5.5+ no no no no
 
Path or URL for the linked document or object.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Language of the linked document.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Number of pixels of space to the left and right of the element (i.e. horizontal margin).
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Sets an HTTP response header for the value in the content attribute.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Unique identifier for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Short text description for the element.
4.0+ 1.0+ 4.0+ 1.0+
 
Language code for the content of the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Script language for the element.
3.0+ 2.0+ 1.0+ no 1.0+
 
Number of pixels that the element is offset from the left.
no 4.0+ no no no
 
URL that contains a long description of the contents of the element.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Number of times to loop the media file. Specify "infinite" for a continuous loop.
2.0+ no no no 1.0+
 
URL for a low-resolution version of an image.
4.0+ no no no no
 
Media type associated with the element.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Top and bottom margins (in pixels) for the document.
4.0+ 4.0+ 1.0+ 7.0+ 1.0+
 
Left and right margins (in pixels) for the document.
4.0+ 4.0+ 1.0+ 7.0+ 1.0+
 
Maximum number of characters that a user may type into the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Specifies the method to use to transfer form data to the server.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that a user can select multiple options.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Unique name identifier for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element has no href.
4.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element cannot be resized.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element should not have shading.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element text should not wrap.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies whether to "clip" the content of the layer if the content exceeds the layer boundaries, or leave the content as-is.
no 4.0+ no no no
 
Specifies whether to use the background or foreground color palette for the element.
no 4.0+ no no no
 
Horizontal position of the element in the browser window.
no 4.0+ no no 1.0+
 
Vertical position of the element in the browser window.
no 4.0+ no no 1.0+
 
Specifies a web page with installation information for the plugin for the element.
no 4.0+ no no 1.0+
 
Specifies the point size of the font.
no 4.0+ no no no
 
Specifies the URL for the meta-information dictionary.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element is read-only.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Defines the relationship of the linked document to the current document.
3.0+ 4.0+ 1.0+ no 1.0+
 
Defines the relationship of the current document to the linked document.
3.0+ 4.0+ 1.0+ no 1.0+
 
Number of rows in the element.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Number of rows that the element should span.
4.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies the dividing rules for the element.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies the scheme for the value of the content attribute.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies cells that the element is a header for.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies whether or not the element has scroll bars.
4.0+ no no no no
 
Specifies the number of pixels between the end of one block of content and the start of the next while scrolling.
3.0+ no no no 1.0+
 
Specifies the delay (in milliseconds) between the end of one block of scrolling content and the start of the next.
3.0+ no no no 1.0+
 
Specifies whether or not the element has scroll bars.
2.0+ 2.0+ 1.0+ 4.0+ 1.0+
 
If present, specifies that the element selected by default.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
For an anchor that defines a hyperlink, shape of the selectable hypertext region.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Size of the element.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Number of columns that this column should span.
4.0+ 6.0+ 1.0+ 7.0+ 1.0+
 
URL for the source for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Text content to dislay while the object associated with the element loads.
3.0+ 4.0+ 1.0+ 4.0+ 1.0+
 
Inline style for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Summary of the contents of the element.
4.0+ 1.1+ 1.0+ 7.0+ 1.0+
 
Position of the element in the tabbing order for the document.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Target window to use for opening the linked document.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Short text description for the element.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Number of pixels that the element is offset from the top.
4.0+ no no no 1.0+
 
If present, specifies that the scrolldelay value should not be rounded up to 60 milliseconds.
4.0+ no no no 1.0+
 
Specifies the unit for the height and width of the element.
no 4.0+ no no no
 
Specifies whether or not the element is unselectable.
5.5+ no no no no
 
Specifies a URL to use for an image map or object map.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Text containing the value of the element.
4.0+ 1.1+ 1.0+ 7.0+ 1.0+
 
Specifies the type of value for the element.
4.0+ 1.1+ 1.0+ 7.0+ 1.0+
 
Specifies whether the element is hidden or shown.
no 4.0+ no no no
 
Number of pixels of space above and below the element (i.e. vertical margin).
2.0+ 1.0+ 1.0+ 7.0+ 1.0+
 
Vertical alignment of the element.
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies the weight of the font.
no 4.0+ no no no
 
Width of the element (pixels or percentage).
2.0+ 1.1+ 1.0+ 4.0+ 1.0+
 
Specifies word wrap behavior within the element.
4.0+ no no no 1.0+
 
If set, specifies whether to override the default whitespace handling within the element.
5.0+ no no no no
 
Namespace for XML-based tags.
2.0+ 1.0+ 1.0+ 4.0+ 1.0+
 
Positive integer specifying where an element is stacked in relation to other layers.
no 4.0+ no no 1.0+
 

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