hash is a property of both the Link and the Location objects and is a string beginning with a hash (#). It specifies an anchor name in an HTTP URL. Assuming a link (stored in the first element of the links property) to a URL ...

http://home.newco.com/products/enquiries.htm#local?email=name@otherco.com

...the following code would display the hash property of it:

Code:
document.write(document.links[0].hash)

Output:
#local?email=name@otherco.com

NOTE:

Although the hash property can be set at any time, it is safer to set the href property to change a link.