DOM Attributes

Question 1

attribute.name

var x = document.getElementsByTagName(“BUTTON”)[0].attributes[0].name;

Answer 1

Returns the name of an attribute

Question 2

attribute.value = value

var x = document.getElementsByTagName("IMG")[0];
x.getAttributeNode("src").value = "pic_bulbon.gif";

Answer 2

Sets or returns the value of the attribute

Question 3

attribute.specified

var x = document.getElementById(“demo”).attributes[0].specified;

Answer 3

Returns true if the attribute has been specified, otherwise it returns false

Question 4

namednodemap.getNamedItem(nodename)

var btn = document.getElementsByTagName("BUTTON")[0];
btn.attributes.getNamedItem("onclick").value;

Answer 4

Returns a specified attribute node from a NamedNodeMap

Question 5

namednodemap.item(index)

var x = document.getElementsByTagName(“BUTTON”)[0].attributes.item(0).nodeName;

Answer 5

Returns the attribute node at a specified index in a NamedNodeMap

Question 6

namednodemap.length

Answer 6

Returns the number of attribute nodes in a NamedNodeMap

Question 7

namednodemap.removeNamedItem(nodename)

var btn = document.getElementsByTagName("INPUT")[0]; 
btn.attributes.removeNamedItem("type");

Answer 7

Removes a specified attribute node

Question 8

namednodemap.setNamedItem(node)

var h = document.getElementsByTagName("H1")[0];
var typ = document.createAttribute("class");
typ.value = "democlass";
h.attributes.setNamedItem(typ);;

Answer 8

Sets the specified attribute node (by name)