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A tag is a declaration of a HTML object whereas an Attribute is a property of an object.
There is an attribute which defines the name of the image to be displayed. The attribute is called as ALT or alternate.
The color of a hyperlink that has not been clicked can be specified by setting the "BGCOLOR" attribute in the
You can change HTML attributes easily. Using Dom that can be done using JavaScript.
This is not a tag. It is an attribute and part of CSS