Reading GET variables with JavaScript

GET.js

function getUrlVars() {
	var vars = {};
	var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
		vars[key] = value;
	});
	return vars;
}
$(document).ready(function() {
	//read get variable
	var activate = getUrlVars()['activate'];
	if (activate == 'true') {
		$('#modal_activate').arcticmodal();
	}
});