What is location.search in javascript?

location is an object that provides information about current url.
"search" is a property of location object that gives query portion of the url.
For example,
if url is : http://www.sample.com?id=1&qs=5
then window.location.search will return "?id=1&qs=5".
You can apply regular expression on this result to get query string parameters in javascript/jquery in case if you don't want to go with any plugin that reads these values.