Ian Bicking: the old part of his blog

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JavaScript actually does have access to GET variables:

http://www.devguru.com/Technologies/ecmascript/quickref/location.html

The location object has two properties which might interest you:

location.search is the part of the current URL beginning with a question mark. Should be easy to parse

location.hash is the part of the current URL beginning with a hash mark (#), which denotes an anchor name in the document
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by Will McCutchen