javascript - Implement s2s pixel -

I have to implement the s2s pixel in the website and it is in my pixel. I have to use javascript And they also send me javascript code

  function getParameterByName (name) {name = name.replace (/ [\ [] /, "\\ ["]. (/ [\ ]] / Var "regex = new RegExp (" [\\? & Amp;] "+ name +" = ([^ & amp; #] *) ", result = regex.exec (Location.search); return result === faucet? "": Decoderic component (result [1] .replace (/ \ + / g, ""));}   

download in my landing page Ton occur when a user clicks on the pixel it should help me