Use CoffeeScript and JQuery to bind click event at website for getting parameters of a form at URL. In someone.js.coffee file. The following example is modified from reference 1,2,3 and 4 to meet my need. get_parameters_from_url = -> aryParams = {} # Initial an empty object rawVars = window.location.search.substring(1).split("&") #window is used to getting global variables of browsers in coffeescript. location.search is the query string at URL including the question