Get the id of the <head> element of the current document:
var x = document.head.id;
Click the button to display the id of the head element in the document.
<!DOCTYPE html> <html> <head id="myHead"> <title>My title</title> </head>/*from w w w . j av a 2 s . c o m*/ <body> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() { var x = document.head.id; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
The head property returns the <head> element of the current document.
If there are more than one <head> element in the document, this property returns the first one.