Getting elements by ID

ID is a unique name or number used by javascript to access particular element in HTML file .

                              var x = document.getElementById("color");

getElementById is used to access a particular Id specified in the brackets  i.e. color in this case . Variable x references to the particular element that has the ID color .


nodeName property


nodeName property is used to determine the type of element we are accessing through the ID e.g. in this case :


                      alert ( x.nodeName) ;

would return the type of HTML element to the window screen .