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. For example, assuming the following URL to be your current window...

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

...you could find out the hash property as follows:

Code:
document.write(location.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 location