Get query string values in JavaScript?

Here is a simple function made using RegEx to get Query String values from URL in JavaScript.

	// Function ::
	function getParameterByName(name) {
	name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
	var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
	results = regex.exec(location.search);
	return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
	}
	// Usage ::
	var queryVar = getParameterByName('key');

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